Cooking, time efficient yet intense workouts, non-medical books and magazines as well as news, get everything fixed on your car (and a new battery might help too if it is old), beers and wines of the world, movies, music, regional things you might miss (if you are moving to a new area), and destressing exercises. The last one sounds like a joke but it isn't. Start learning various methods to destress in short periods of time through breathing and other hippy type stuff. Then apply it when you are in school. You will feel much better.
People tend to forget that as a physician and a medical student, you will interact a ton with people who AREN'T in the field. So, being well read, cultured and interesting can pay off in the long run. I've established fantastic rapport with people simply because I could talk about something seemingly obscure that they were passionate about.
