A Practical Guide to Improving Your IQ and Brain Function

Many people used to believe that our intelligence was fixed by early adulthood - that the brain we were born with was the brain we were stuck with. Modern neuroscience, however, has shown the opposite.

Your brain has a built-in superpower called neuroplasticity. This means it can restructure its pathways, adapt to challenges, and work more efficiently depending on how you treat it. A sharper mind isn't just about genetics; it is a direct result of daily lifestyle choices.

So, can you actually improve your IQ? The answer, backed by decades of research, is yes - at least in meaningful, practical ways.

This idea isn't new. Nearly two thousand years ago, the Greek writer Plutarch already sensed it - to paraphrase: "The mind is not a vessel to be filled, but a fire to be kindled."

Let's look at the most practical, daily habits you can start using today to help your brain work at its best.

1. Learn a new skill

The first step is simple: give your brain something new to wrestle with.

"Anyone who stops learning is old, whether at twenty or eighty."

— Henry Ford

The brain responds well to challenge. When you learn something new, you force your mind to form new connections and to use old knowledge in new ways.

This does not mean you need to study something difficult all day. You can start with simple but interesting and challenging activities, such as:

• learning a new language
• playing a musical instrument
• playing chess
• taking an online course
• learning to cook new recipes
• practicing drawing, writing, or coding

If a new skill feels slightly uncomfortable at first, that is not a bad sign. That is probably your brain waking up and asking, "Are we really doing this now?"

Stepping outside your comfort zone and getting creative pays off in confidence and sharper thinking.

In addition, teaching someone else what you've learned speeds up your own learning because you have to think about the material more deeply.

Sometimes it is also helpful to avoid relying on autopilot for tasks you already do. Doing mental math or varying your routines can activate new brain pathways and keep your mind flexible.

2. Read regularly

Reading is basically a full-body workout for your imagination. It also builds vocabulary and trains focused attention. While passive screen consumption and scrolling only hold your attention for a moment, reading encourages you to stick with an idea for much longer.

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

— Charles W. Eliot

When you read, your brain actively constructs the scenes and ideas on the page - that visualization process is cognitively demanding in a good way. It's also why the book is almost always better than the movie: your brain did the special effects.

Non-fiction, fiction, long-form journalism, history, or other topics - the format matters less than the habit. And audiobooks absolutely count too - your brain is still doing the heavy lifting, even if you're just doing the dishes while listening.

Even 20–30 minutes a day adds up quickly over time.

Finding a comfortable place to read or joining a book club can help you stay committed. Talking about books with others makes reading more enjoyable.

3. Learn a new language

Staying on the theme of stretching the mind, few things stretch it quite like a second language.

Bilingual people make up a large part of the world's population, and learning languages can help rewire the brain for better memory, multitasking, and flexibility. Recent studies show that practicing a new language actually can change the physical shape of your brain, bulking up the areas responsible for memory.

There's an even more remarkable finding: studies suggest that lifelong bilingualism might delay the onset of dementia symptoms by around four to five years - outperforming any drug currently on the market. As an old Czech proverb puts it, "Learn a new language and get a new soul."

Begin with small steps. You can try using apps, online courses, watching movies, or talking with native speakers. Practicing a little every day can really make a difference.

4. Stay physically active

You might expect a brain guide to be all about thinking. But one of the best things you can do for your mind is to get off the couch.

Movement increases blood flow, supports mood, improves sleep, and helps the body manage stress. A tired, inactive body often leads to a tired mind, too.

Studies have found that physical activity also promotes the release of BDNF (brain-derived neurotrophic factor). This is a protein that grows and maintains neurons, boosting memory and learning.

Good options include walking, cycling, swimming, dancing, hiking, gym training, or sports. If you can make it social - a team sport, a group class - that adds a second cognitive benefit. Strength training is also useful, especially as people get older.

Avoid sitting for long periods without moving. Even a short walk can clear the mind, improving creativity and focus when you return to your tasks.

5. Eat for brain health

Your brain makes up about 2% of your body weight but uses around 20% of your daily energy - a small, greedy organ that runs the whole show. So it needs fuel and healthy nutrients. Of course, no single food will make you a genius, but your overall diet is important.

Certain foods have strong evidence behind them:

• Fatty fish - high in omega-3s, essential for neural function
• Nuts and seeds - omega-3s plus vitamin E, an antioxidant that protects brain cells
• Dark chocolate - flavonoids that support blood vessel growth in memory-related brain regions
• Fruits and vegetables - antioxidants that reduce cellular damage
• Whole grains - steady glucose release supports sustained mental energy
• Turmeric, ginger, and cinnamon - anti-inflammatory compounds with documented neuroprotective effects
• Green tea - contains L-theanine, which promotes calm focus without drowsiness

Stay hydrated. Try to limit highly processed foods, too much sugar, and heavy alcohol use. These do not destroy the brain overnight, but over time, they can affect energy, mood, weight, blood sugar, sleep, and concentration. Mediterranean-style eating patterns also show strong protective effects.

6. Protect your hearing, vision, and general health

“The first wealth is health.”

— Ralph Waldo Emerson

Food is one way the body talks to the brain - but it's not the only one. Your brain doesn't operate in isolation; it's connected to the whole body, so problems in other systems can quietly affect your thinking, memory, and mood.

Take your senses, for example. If you cannot hear well, your brain has to work harder just to follow conversations - energy it would rather spend elsewhere. If you cannot see well, reading and learning become harder. Over time, untreated hearing or vision problems may also reduce social activity and mental stimulation.

Other health factors, such as cholesterol, smoking, blood pressure, and blood sugar, matter too. A healthy heart and healthy blood vessels help supply the brain with oxygen and nutrients. So, in many cases, taking care of the heart also helps protect the brain.

7. Manage stress

A stressed brain can feel like a browser with 47 tabs open - and one of them is playing music, but you cannot find it.

A little stress can push you to act. Too much stress for too long, however, can harm focus, memory, sleep, and mood.

The good news is that managing it doesn't require a mountain retreat. Some useful options include:

• walking outside
• slow breathing
• prayer or meditation
• journaling
• stretching
• spending time in nature
• talking with someone you trust
• laughing often

The goal is not to remove every problem from life. That is impossible. The goal is to give your brain enough time to calm down and recover, which restores your focus and emotional balance.

"Rule No. 1 is, don't sweat the small stuff. Rule No. 2 is, it's all small stuff."

— Robert Eliot

8. Sleep matters

If chronic stress is what wears the brain down, sleep is how it repairs itself.

When you sleep, your brain gets to work by clearing out toxins and turning short-term memories into long-term knowledge. Scientists only confirmed this cleanup system (called the glymphatic system) about a decade ago, and it's a useful image: while you're unconscious, your brain is basically taking out the trash.

Chronic sleep deprivation doesn't just make you tired - it impairs memory formation, slows processing speed, and increases long-term dementia risk. Most of us need 7 to 9 hours of quality sleep. The famous phrase "I'll sleep when I'm dead" might, ironically, be a slightly faster route there.

9. Stay socially connected

Human beings are social creatures. Conversations, friendships, family, teamwork, and community all challenge the brain in natural ways.

Think about what a simple conversation actually requires: memory, attention, emotion, language, humor, and quick thinking. All running at once. A good conversation is a surprisingly good workout for the mind - no equipment required.

Strong relationships are also linked with better well-being. And when people feel better emotionally, they usually think better too.

10. Use brain games, but do not expect miracles

Puzzles, chess, Tetris, memory games, Sudoku, and strategy games can be useful. They train attention, planning, pattern recognition, and problem-solving.

But there is one important detail: getting better at a brain game often means you get better at that game. It does not always mean your general intelligence has increased.

Still, games can be a fun way to challenge yourself, especially when combined with real-life learning, reading, exercise, and social activities.

You can also try a Brain-training app. They have gotten a mixed reputation, but recent research is more positive. A 2025 study found that 10 weeks on some structured brain-training programs restored a key cognitive signaling system in older adults to levels typically seen a decade younger - the first time any intervention, pharmacological or otherwise, had achieved this in humans.

A good rule about games is this: choose games that make you think, not games that only keep you clicking.

11. Rely a little less on technology

Technology is very useful, but it can also make the brain lazy in small ways. Psychologists even have a name for it - the "Google effect," or digital amnesia: we increasingly remember where to find information rather than the information itself.

AI chatbots can take this a step further when we ask them to do the thinking for us, rather than simply helping us. In a 2025 MIT-led study, people using ChatGPT to write essays showed the weakest brain connectivity of the three groups and had more difficulty accurately recalling or quoting what they had written. The researchers called this possible cost “cognitive debt”: when the tool does too much of the mental work, the brain may skip part of the workout.

You do not need to stop using calculators, GPS, reminders, search engines or AI tools. But sometimes it is good to make your brain do the work first.

For example:

• Calculate something simple in your head
• Try to remember a route before opening maps
• Memorize a short list
• Write notes by hand

Small mental efforts add up. The brain likes being used.

Interesting fact: London taxi drivers spend years memorizing the city's 25,000 streets to pass an exam called "The Knowledge" - and brain scans show the part of their brain responsible for spatial memory, the hippocampus, is measurably larger than average. They essentially strengthened that brain region by using it.

12. Reduce passive screen time

This brings us to one of the biggest challenges to sustained attention today. Not all screen time is the same. Watching a documentary, taking an online course, writing, coding, or learning a language is very different from scrolling through short videos for an hour without thinking.

The problem is not the screen itself. The problem is passive screen time.

In recent years, researchers have noticed that IQ scores have stopped rising - and even begun to decline in some countries. This is sometimes called the reverse Flynn effect. The exact reasons are still debated, but possible explanations include changes in education, less reading, more time online, different lifestyle habits, and reduced mental effort in daily life.

This does not mean that the internet is making everyone dumber. That would be too simple. But it does suggest that how we use our attention matters.

Passive screen consumption can train the brain to expect constant stimulation and quick rewards. Platforms like TikTok, Instagram Reels and YouTube Shorts take this to another level with their endless stream of 15-second clips designed to hook your attention instantly. They are entertaining, but are engineered to keep you swiping: each clip delivers a tiny burst of dopamine, and the autoplay makes sure you never have to stop and think.

A large meta-analysis of nearly 100,000 people found that frequent short-form video users scored lower on attention, inhibitory control, and working memory - the exact skills you need for reading, studying, and problem-solving. One 2024 study summed it up neatly in its title: "Swiping more, thinking less." The trend is real enough that "brain rot" was named Oxford's word of the year in 2024.

A good rule is this: use screens more actively and less passively.

For example:

• Watch less random short-form content
• Read long articles instead of only headlines
• Use apps for learning, not only entertainment
• Create something instead of only consuming
• Take breaks from social media
• Avoid using your phone during meals and before sleep
• Spend more time with books, nature, exercise, and real conversations

You do not need to remove screens from your life. Just make sure they are not replacing the habits that keep the mind strong.

Conclusion

Congratulations - if you made it this far and actually read carefully (maybe even remembered a few things along the way), you've already given your brain a solid workout.

You may not be able to turn your IQ into any number you want. Nobody can promise that.

But you can improve how your brain performs. You can become more focused, more knowledgeable, more disciplined, and better at solving problems - which, honestly, may serve you far more in real life than chasing a perfect test score ever could.

Making small changes regularly can lead to lasting benefits. Whether it's picking up a book, moving your body, or logging off TikTok for a while, each of these can help. Try starting with one or two habits that fit your routine, stick with them, and see how your thinking and focus improve over time.

Your brain will thank you - assuming you remembered to feed it, walk it, and put it to bed on time.

More useful resources:

» What Famous People Think About IQ?
» People With the Highest IQ
» Is IQ Important?
» What was Einstein's IQ?