1. On the examination day, do not worry, even if you feel that you remember nothing! Give it your best shot, you will be able  to     recall once the questions are in front of you.
2. Start solving paper as soon as you get it. Leave the questions which you do not know   and while doing this you will be able to go through the paper and also able to solve at least those questions which you know.
3.  Don’t make yourself confuse with the tough question, you only need to solve easy questions in exams J .

4.  Try to be relaxed before the exam.
5. Try to check units of all number used in a formula.
6. If a question is easily solved, see that again there may be some trick in that.
7. If you are feeling that exam is tough than do not worry it is a competition it will be the same for all.
8. Eat well before the exam and revise the formulas before exam days
9. The best way to attempt a competition paper which I found by my experience is that start paper as soon as you get it.
i) Solve only those questions which you know.
ii) And again start the paper: solve those questions which you think you can solve.
iii) Again start paper: solve those questions which can be tried.
iv) At last the tough questions and some questions which you are confused and want to give a try.

* The Author is running a coaching center from last 30 years for entrance exam preparation.