[bassguitagirl]

Pssh, I study the night before the test and don't even go to sleep, stumble into class, and knock out that thing in 30 minutes.

or for more persevering people, study like a fool in the library with a tankard of black coffee days in advance. Everyone's method is different, but remember to replicate the situation during the test (say you drank coffee while studying -- drink coffee during/before the test) for maximum recall.