yeah like others, i tend to wake up early-ish whenever i drink, no matter what time i got to bed.
i'm pretty sure its from being at uni and stayin up late, but i really can't get to sleep anytime before midnight! Though (also from being at uni) i've discovered having nap-naps during the day if i get a chance and tired enuf - suppose that's really why i can't get to sleep b4 12!?!?
If i have to get up early for work or school or whatever (ie: other "appointments"), i can get up - tho sometimes it is a bit of a struggle. Then on days off, body usually likes to sleep in til all buggery, as long as i don't have to do anythin in particular for that day. Tho i try to get up at 11 am most days and go do sum form of exercise.
If i don;t do any exercise for like even 3-4 days, my body feels super sluggish and i try and either go for a ride, or spin class at gym, or weights or core body work at gym.