Your time is better spent mastering the present material. Be prepared to do your best. Prepare your brain for optimum performance by keeping your physical resources well maintained. Get a good night's rest before the test. And keep up with your regular exercise.
Anxiety is highly contagious.
It is best to focus on what you know rather than on what you don't know. Reinforce your strengths and confine your weaknesses. For this reason it is also best not to study new material the night before a test. Give yourself enough time to select a seat and calm down before the test papers are distributed. Remember to bring your student card and more than one HB pencil.