I'm not going to lie, this one is very tough. Exercise is a good one. For me it was very hard to not go crazy. The last month I was in my room studying for all hours of the day. Personally if I had to do it again (which I might 🙁 ) I wouldn't do this again. I found the lack of human interaction with people was becoming a breaking point. It was also especially hard because I had a girlfriend who was away at college who I couldn't visit during that last month, which made it even harder not seeing her. Sounds lame but for me it was all about just talking to people and keeping up with friends, towards the end of my studying I would go over my friends house and have a couple of beers with them which helped me from being tense and stressed all the time.