Things you can do with your life (i.e. what I would do with mine if it weren't for school, university, etc) instead of wasting your time

a) Get a job, make $$ - I know it doesn't sound fun but time wasted could not be better spent making dough.
b) Read a book - On top of the obvious mental benefits, having read multiple books can make you more cultured in conversation, and provides a sense of accomplishment
c) Watch a movie (a GOOD one) - It still boggles me how so many people have access to so many free, torrentabll movies that they simply don't watch. Classics like The Godfather, Fight Club, The Big Lebowski, and Shawshank Redemption all go unwatched amid the constant drivel that comes out of Hollywood these days
d) Socializing over the internet - Okay, this one is beyond obvious. Everyone you socialize with at school? Guess what? PROBABLY ON FACEBOOK, SKYPE, OR ANY OF THE OTHER ENDLESS SOCIAL MEDIA SITES THAT EXIST. It's not the same as face-to-face, but gosh-diddly-darn if they could stand your presence in real life then they'd probably be okay with you messagin them too (me? I'd have loved it if you'd messaged me a "Happy Holidays" or a "wats up im so bored bcuz thrrs no shcool" over the past two weeks)
e) Finally, learn something - THere's a plethora (do you know what that means? If not, pay attention folks) of resources such as University websites (MIT in particular), as well as the new iTunes U that offer FREE (yes, free) education - lectures, videos, etc. For $0.00. I'd pick up a notebook or free note-taking software like Evernote and watch some of these lectures, documentaries, and the like, actively taking notes while it plays. It will help you in school, and you'll actually probably learn something! Plus, the more you learn, the more you know, the more you can talk about. Nothing starts a conversation like "Hey, did you know Monarch butterflies can get energy from the sun?" (Which they actually can, which is cool).
Anyways, hope you and everyone reading knows what to do next time their twiddling their thumbs. And remember kids, half the stuff I mentioned has a mobile app, so you can do it while your waiting too!
PS I'd like to point out that I did not cuss throughout this entire bit of writing - big step for me!