Five important points to remember during exam:
1. Be on time - arriving on time makes you feel relaxed.
2. Take care of the technicalities - budgeting time, bringing the right equipments, writing legibly, improving weaker answers before polishing the good ones.
3. Read and Follow the instructions.
4. Breathe deeply... and don't panic =)
5. Answer the question. Establish what it ask for; recall, select relevant material, organize it, and formulate your answer.
GOOD LUCK!! =)