One easy way to relieve stress is to write down your hopes, emotions, and thoughts. One study had several classrooms of students choose to write down their thoughts before their test or not at all. The students that chose to write down their thoughts had an overall better average grade than the ones who didn't write anything. The students who reported their experience said they felt more relaxed after writing down their thoughts on paper. This study goes to show how owning a diary might not be such a bad idea.
Stretching, moving, and breathing can all help relieve stress. Taking deep breathes for two to five minutes can slow your heartbeat and put you in a more relaxed state of mind. Stiffen and relax tense muscles. If your shoulder is stiff, pull it back and hold it there for a few seconds, then relax.
Some colleges have even dedicated a "puppy room" where students can prepare for their tests.