10. Late Night Philosophizing

Put a bunch of kids who don't know who they are and what the hell they're doing with their lives in a room with a bunch of mind-altering substances, and you have a recipe for some seriously deep conversation. It just flows.
Sadly, this fades with age. For one, it gets harder and harder to admit you don't know what you're doing – to yourself or to anyone else. And when you start looking like one of the olds, anyone selling weed is just going to think you're a narc. So enjoy those chats while they last.
11. Tipsy Tuesdays… Wasted Wednesdays… Thirsty Thursdays

Thanks to a working liver, 11am wakeup time, and total lack of inhibition, going out every night in college was easy. Now… not so much.
12. Going to Class in Pajamas
Try showing up to work like this. Unless you want to be taken seriously, or promoted anytime soon.