Decide to eventually start studying... 9 p.m
But before that make sure you get updates from your friends
After socializing virtually, do some real one... 11 pm
Get back to room, but before starting to study, spend some more time a bit more responsibly... 1am
Once you make sure everybody is sleeping, you can get to work... 3 am
The nature will let you know when its time to go to bed... 6:30am
Do consider consequences though.