Manage your time effectively
Review how many questions there are and estimate how much time you anticipate spending on each question.
Plan an outline of the answer before you write it
Pace yourself and take breaks
Don't work on an exam more than 60 minutes without a short break. A five minute break can work wonders. And definitely don't pull the dreaded all-nighter!
Be concise
Don't over answer questions. Aim for succinct, well-supported answers.
Maintain a positive attitude
Do not lose confidence or waste time if you encounter confusing or difficult questions. Take a break and return to the question refreshed.