Dry your nails:
Stick them in a bowl of ice water, and you’ll have instantly dry nails.
Remove red wine stains:
Apply shaving cream; let it rest for a few minutes.
Study!
Firstly, before you sit down to do work, always know what you’re going to do. For each course, make a detailed list of everything you feel you need to do to prepare for exams—chapters to read, lecture slides to go over, notes to write up, etc.—and block out certain days for certain courses, then try work your way through this list.
Secondly, in terms of actual study, the best study/break balance is to work hard for 25 minutes, then have a five-minute break and repeat, except that every third break should be 20 minutes; use this time to make yourself some decent food and/or go for a walk.
Thirdly, and most importantly, print out inspiring pictures of cats to stick on your walls.