1. Diet: You should eat three healthy meals a day. You shouldn't eat foods containing a lot of sugar, oil and fat, because they are bad for your health. Don't eat too much junk food. You should eat enough vegetables and fruits, because they are rice rich in vitamins. You should drink enough milk and water.
Other habits: You should get enough sleep. If you don't get enough sleep, you will feel tired and you won't be able to concentrate better. You shouldn't drink, smoke and take drugs. Don't play computer for too long. Wash your hands before meals and exercise every day.