The Night Before
Do not revise new material the night before an exam. Do a light review of key formulas or quotes, then stop by 9pm. Sleep is not optional.
Morning Of
Eat breakfast. Avoid people who want to compare notes outside the exam hall. Get in, find a quiet corner, take some deep breaths.
During the Exam
Read every question carefully before you start writing. Time management is everything. If you're stuck, move on and come back.
After the Exam
Don't do a group post-mortem. Focus on whatever's next. Celebrate the small wins. Finishing an exam is an achievement.