Facebook detox FOR SURE, especially if you went through that palaver of relationship status, breaking up publicly (glad I haven't had to go through that ****, just like being a celebrity) with people saying "What's up hun xxx" and having to explain to everyone why someone dumped you. Urgh!
Then go out and enjoy the freedom that she's "given" you. Meet up with friends that you haven't seen in a while, chat about old times, do things you used to do before her and do some new things too. That's how I got over my ex. I had a great holiday not thinking about sex and no pressure to pull people and take photos to make my ex jealous or whatever (another reason to detox on Facebook, see a pattern here?). No pressure, no worry. When you've calmed down a bit, like getting drunk on drink of your choice and saying what a **** she was, then you can excavate the broken relationship for lessons in the future. Until then, quit digging and cross that bridge later!