Waking up early provides you with sufficient time to get ready for the day and prevent being in a rush. It also gives you a chance to learn when your mind is alert & refreshed.
Sipping water as soon as you wake up replenishes your body and brain and enhances cognitive processes and concentration.
Having a healthy breakfast gives your brain the energy it requires to concentrate and function well. Select foods that are rich in protein, fiber, and healthy fats.
Exercise boosts blood flow to the brain, enhancing mental function & minimising stress. Even a short walk or some gentle stretching can help.
Take a few minutes to go through your notes from the day before. This will reinforce your learning and help information come to mind more easily when you sit down to do the exam.
Mindfulness and meditation can also allow you to center your mind and calm your nerves. Even practising for a short while each day can have a beneficial effect.
Plan your day and organise your work. Prioritise your work to maintain your focus on what's most important.
Adequate sleep is required for proper functioning of the brain and consolidation of memory. Try to sleep for 7-8 hours each night.
Some more things that you can do to improve your concentration and crack your exams:
Make a study timetable and adhere to it.
Identify a quiet spot to study where you will not be disturbed.
Take breaks to prevent burnout.