Proper diet and sleep is important in order to perform well during studies. Eat on a regular basis. Stay away from foods that contain a lot of sugar and fast carbohydrates. Healthy nutrition is the key. Get enough sleep. Being tired while studying will result in a lack of concentration. Keep in mind that students need between 7 to 9 hours of sleep each night. If you do not get enough sleep, it will affect your concentration and learning ability.