I like to play "Got to Be Real" and dance in my bathroom, Sex and the City style. That ALWAYS puts me in a good mood
Definitely take care of yourself (eat well, work out, etc) as that will make you feel physically well and translate to your brain and heart as well (the metaphorical brain and heart I mean). DON'T listen to sappy music. DON'T look at pictures of him. DO hang out with friends. And remember, that the old saying is true - it just takes time.
I'm going to a concert tonight where I will most likely see my ex boyfriend and maybe even his little doctor girlfriend. BUT, I am with the best guy in the world now and have never been happier in a relationship and I thoroughly plan to show that happiness off tonight, whether or not he's there.
Success is the best revenge!