WHOLE FOODS EDUCATION
A method that works well for most people is studying in small pieces instead of large chunks of time. Studying in large chunks of time increases the chance that you will overwhelm your brain with information and start forgetting things. If you study in small pieces of time, you aren't absorbing all of this information at once and get chances to rest. Furthermore, you should rehearse what you study and do it in expanding time intervals. For example, if you study ten digits of PI, you could attempt to rehearse the ten digits in one minute, then two minutes, then four minutes, and so on.
In addition, state of being is important for studying. It has been shown that if you study while intoxicated, you will do better if you take the test while intoxicated. If you study while sober, you will do better if you take the test while sober. The sober case showed better results than the intoxicated case. Thus it's better to stay away from the drinks while studying and while taking the test.