Seriously Fitzy, the sleep factor is grossly underrated in graduate school and I can't tell you how many of my classmates are just grumpy, unpleasant people to be around when they don't sleep. Sure they may have gotten in a couple extra hours of studying but it'll bite them in the butt in the long run! I would never want any of them to be my doctor in that state...having a grumpy lawyer would probably be just as bad, LOL. Take care of yourself and sleep!