Forgot to mention that I've found oranges to be a good study snack if you're not on the low-carb kick. The citrus smell and taste really wakes me up when I get bored and sleepy with whatever I'm reading. Also, b/c peeling them takes more effort than opening a bag of chips, and being the lazy-ass that I am, I'm only likely to eat one.
In the morning, I work out at the gym, 35 minutes on the elliptical followed by 25 minutes on the stationary bike. I also walk quite a bit during the day (to, from, and on campus). Hopefully I can keep it up next year in med school.
I get up at 4am when I have to be at the hospital early. If not, I get up at 4:30 or 5am. I give myself 15 min or so to wake up then I jump on the treadmill. I've started watching the TV series DVD's. I've been thru ALIAS seasons 1-3, 24 seasons 1, 2, and now on 3. It's awesome to have an action packed show to watch every morning. I've enjoyed 24 more so than alias. It gets to were I have to MAKE myself get off the treadmill and RATION myself to only 1 episode per day.
I've also just started spinning classes a few times a week to add a little variety. In addition, I've begun to run with at least a 2.5-3.0 incline. I only run 3 miles/morning because it's really all I have time for. I do weights and abs some mornings if I have extra time, or on the weekends.
When it's nice outside in the evenings, I will go for a run with my toddler in the jogging stroller.