There is no shortage of advice claiming to improve your performance, but mindfulness meditation is a rare, research-proven approach to physically modifying your brain. However, if you want to improve your brain, Dr. Tom o' Bryon's book how to fix Your Brain is a good place to start. According to the author's point of view, making a few lifestyle modifications might help keep your brain healthy far into old age and may help prevent or delay the onset of neurological illnesses. 

Focus on your breathing. 

Spend a few minutes sitting in a comfy chair with your feet flat on the floor, doing nothing but breathing slowly in and out. Concentrate your full attention on your breathing. Feel the air enter your mouth, move through your windpipe, and into your lungs. Then, as your body pushes the air out of your lungs, notice how it shifts. Don't be concerned if thoughts arise because you lose focus on your breathing. Do not permit any other thoughts to your mind just focus to your breathing. If you regularly do the breathing practice you can increase your time completely immersed in breathing by putting all other kinds of thoughts.

Exercise regularly.

You can fix your brain easily by doing regular exercise. Doing an exercise have many health benefit it also good for your brain. Those who are doing exercise regularly will have a low risk by affecting any disease. If you do the exercise regularly your blood flow to the brain will increase and give you benefit. Try to do the exercise regularly at least 30 -60 minutes in a day. Walking, swimming, tennis, or other moderate aerobic activity will raise your heart rate.

Take care of your feelings.

On cognitive function tests, those nervous, sad, sleep-deprived, or exhausted tend to do poorly. Poor scores may not always indicate a higher risk of cognitive impairment in old age, although mental health and peaceful sleep are key goals.

Boost your blood pressure levels

In midlife, high blood pressure increases the chance of cognitive decline later in life. To keep your blood pressure as low as possible, make lifestyle changes. Maintain a healthy weight by exercising regularly, limiting alcohol consumption to two drinks per day, reducing stress, and eating well.

Sleep well

Remove any electronics and distractions from your sleeping area and don't exercise more than two hours before night. Avoid large meals and excessive drinks before bed. If everything fails, choose organic tea or other natural sleep aids over other sleep aids.

Do some meditation.

Daily meditation is possibly the single most important activity you can do for your mental and physical well-being. Meditation not only relaxes you, but you can fix your brain. You can exercise your brain in new and exciting ways while enhancing your brain fitness by creating a different mental state.

Manage stress. 

Excessive concern and stress have been linked to poor cognitive performance in exams. To relax and cleanse your mind, try yoga, meditation, walking, or listening to music. Then you can concentrate on the problem and devise a strategy to solve it.
Acquire a New Skill
Learning a new skill engages many brain areas. Your memory is activated, you learn new motions, and you form new associations. Reading books, learning to cook, and making a plane out of toothpicks are all activities that will stimulate your mind and provide you with something to think about.

Improve your eating habits.

Practicing a good diet can give benefit to your mind and your body. It is important to consume fruits, vegetables, fish, nuts, unsaturated oils, and plant-based proteins. Having a healthy eating habit will less likely to develop cognitive impairment or dementia.

Bottom line

Finally, if you are not clear about how to fix your brain, you can read the book named how to fix your brain, written by Dr. Tom O’ Bryon. There are different types of strategies to fix the brain and keep your brain healthy are given in this book.