Two words: FUCK BUDDY.  And preferably one with whom you can study.  I’m serious.  It does wonders.  Nothing eliminates stress quite like having the ability to engage in wild, unadulterated sex in between debating the merits of a certain res ipsa loquitor claim and the applicability of tort law to prenatal injuries.  So just aim for the best combination of looks and brains and fuck your way to an A.  And if this is out of the realm of possibility, go get high and play Super Smash Brothers or some other mindless crap that will help you take a load off.