Some people study better with silence, and some people need noise. So, depending on the type of person you are, maybe either locking yourself somewhere in complete silence will work...or blasting U2 music...
The best study tip that I use when studying for tests is to go through all of my notes, etc. and highlight important stuff before even studying.
This WAS a serious question, wasn't it? You weren't just bagging me for asking for sleep tips, were ya?
*Bonochick has been experiencing paranoia lately*
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"But you take what you can get,
Cuz it's all that you can find,
But you know there's something more,
Tonight, tonight, tonight..."