I do NOT sleep late, I wake up at 7:00AM every day. My days usually run from about 8:00AM to 10:00PM, though sometimes later. My first class on Mondays, Wednesdays, and Fridays isn't until 11:10, but I use 8:00-10:00 to either practice, or finish any outstanding work due for my 11:10 class or my 1:50 class. Tuesdays and Thursdays I only have one class, 2:35-4:20. But in the morning I'm practicing or working on stuff.
Of course this excludes ensembles, and I'm in three of those for a total of 7 rehearsals a week in addition to regular classes. Being in both the College and the Con is a LOT. But I love it.
The only thing I drink is water. Usually between four and five 48 ounce bottles a day. But that has proven to not help me stay awake when I need to.