Approach the exam with confidence. If you are prepared this should be no problem. Get a good night's sleep the night before the exam. Get to the exam early. Find yourself a seat and relax.
Many students do a last minute review.
Relax, if you are prepared you shouldn't need a last minute review. Eat before the exam. Read direction carefully before you begin the exam. Understand what the professor is looking for. Make sure you budget your time.