hmm, well, in high school, i would come home smashed on whatever and then write papers for fun, physics, literary, philosophy or otherwise. I was (umm, am) a dork though. I actually like school, so that was motivation enough. Really, it's a matter of finding something interesting about what you are studying. Oh, and occasionally grabbing a friend's aderall (spelling?) made working lots of fun. That is not recommended without a doctor's Rx though.