Ready to work really hard.
Be confident but not overconfident.
Love what you are doing and give your best.
Ensure that you completely understand all the topics and can work any question.
Go through all your notes regularly.
Maximum of past papers.
Work on a wide variety of topics.
Here is an inspiring Story that this Laureate is sharing with you...
My parents and teachers always told me to give your best without worrying about the outcome. The only thing which matters at the end is that you shouldn't feel that you could have done better.