Staying healthy and fit has stayed a struggle for me! I tend to lose weight during the year, and sometimes can't seem to get away from energy drinks/running on no sleep. You need to do what works best for you... After my first semester I swore off staying up past 1am studying... It's much better to have a semi-refreshed brain and think through critical concepts than a dead one that stayed up all night! Plus, it will make you feel miserable at clinical the next day.
A typical week would be:
Monday class from 8am-4pm. Wake up around 6am (I have to commute), grab dinner on the way back, hit the library until 8. If I have an exam Tuesday... Study group until midnight.
Tuesday class from 8am-4pm (repeat). Bed by 10 or 11 for clinical Wed,Thurs,Fri. I wake up at 0430 in clinical mornings. Prepare your bag the night before.
The week changes, sometimes you have a day as a "study day". And each semester changes for us, so level 1 we had class M&Tues, level 2 we had class M&Fri... It all depends.
Depending if you have an exam Monday or Tuesday... I'd be in the library around 11-5 Saturday and Sunday. It's difficult if you have Thursday and Friday classes, because you're exhausted from clinicals but still have to hit the library after the hospital.
You go into survival mode. Focus on what you have due the next 2 days, not the whole month. And take some time for yourself!!! You need it to keep you sane
After your first semester, you'll develop your own routine and this craziness will become a comforting chaos for you! :-)