'Find a reliable [I've had problems with blockers being too easy to circumvent, I don't want to screw around with deeper modifications to OS etc and I'm often on university computers anyway] way to stop myself using facebook at certain times/days')
If your problem can actually be isolated to facebook, it might be possible to write an app that enacts some sort of negative consequence based on how much time you spend on facebook, regardless of where you spend it.
In an attempt to encourage more people to actually do awesome things (a la instrumental rationality), I am proposing a new monthly thread (can be changed to bi-weekly, should that be demanded). Your job, should you choose to accept it, is to comment on this thread explaining the most awesome thing you've done this month. You may be as blatantly proud of you self as you feel. You may unabashedly consider yourself the coolest freaking person ever because of that awesome thing you're dying to tell everyone about. This is the place to do just that.
Remember, however, that this isn't any kind of progress thread. Nor is it any kind of proposal thread.This thread is solely for people to talk about the awesomest thing they've done all month. not will do. not are working on. have already done. This is to cultivate an environment of object level productivity rather than meta-productivity methods.
So, what's the coolest thing you've done this month?