The first thing you need to do is to ensure you've done the right amount of study, if you're not sure go out onto the internet and look up some accelerated learning techniques. Once you're satisfied that you've done the relevant preparation that's when the belief strategies come in.

Belief is like a table, when it has four legs it's stable, once you start to knock the legs away it wobbles and eventually falls, you need to put some more legs under your table of belief in passing the test.

The first leg was mentioned above...preparation, to add more legs think of everything you've succeeded at in your life, don't dare tell me nothing because I know that is rubbish, everybody has had success and tragedy in their life at some point. If you can't think of anything ask the question, what if I could think of a success if life what would it be?

Get as many successes as you can written down on paper, what did you do to succeed in those situations, how are they similar this situation, keep building and building more legs for the table until your belief is unshakeable, then build a few more.