As vtail said, professional help is the long term treatment. If you need a quick fix, shrink your mind down to simple tasks using internet drugs: cuteoverload, reddit, hulu, tvtropes, HN, plan a trip to japan (doesn't matter if you even go), http://symphonyofscience.com/videos.html , ...
For me, two things help: reminding myself nothing matters as much as I think it matters and setting a medium-term goal. Our decisions can be anything and it's fine. The world--universe--is a big place. Take risks. Nothing worthwhile is judging you. So, build something new. Meet people. If you make a fool of yourself, it doesn't matter at all. Let other people wonder why you're impervious to their hostility. You've seen the truth. In the grand scheme of things, we can't even be seen: http://en.wikipedia.org/wiki/Hubble_Deep_Field
The world is yours to do with as you please. Take advantage of it.