Create and follow a study calendar.
Think about what you study to assimilate and memorize better.
Study only one subject at a time.
Take a break and clear your mind from time to time.
Keep a steady diet and do not stop sleeping.
Organize group question and answer sessions to review among all.
Solve and study all past exams which are availible about the subject you will examine about
Make a summary of the most important thoughts to review the day before the exam.
Keep calm at all times and trust yourself.
Follow a strategy and prioritize the most significant issues.