Haven't pulled an all-nighter since uni started - I'm in my 3rd week now.
Handed in an assignment last week, that I did like 3 days before. Most times I just chill after getting home from uni, and then start studying seriously till I decide to take a break.
It's pretty flexible at the moment, but I do realise that things will be more hardcore real soon.
So far, I've made notes, read my textbooks, done some highlighting, printing research materials and lecture/tutorial materials, participating in discussions on the WebCT.