I have found caffeine almost perfect drug for studying. The secret is not to overuse it. When I take caffeine pill for example half an hour before going to examination I can feel the boost and I can solve the math test with brute force!
I know different people have different sensitivities for caffeine and I'm quite happy with mine, although it also has some drawbacks. When I get hooked on caffeine and start to use it daily the effects are almost gone and I can't get nothing done without it.
Anyway... caffeine / coffee is great when you know how to use it!
