DOs
1. Have a good night sleep before your exam.
2. Have plenty of water.
3. Eat well and healthy.
4. Eat heavy breakfast if your paper is in the afternooon.
5. Relax your mind.
DON'Ts
1. Eat heavy meals 1-2 hrs before your paper.
2. Do last minute revision the night before.
3. Wear out your body too much with activities/exercise.
4. Drink too much water before entering the exam hall.
Hope these tips do helps you get closer to your aim of a better results.
Cheers,