2 cents from a lurking singlet.... change the channel in your head. When I get down and don't want to stay down, I try to listen to happier music, goofy music (i.e. Hamster Dance).

I watch tv and try to get absorbed into the movie/show, I read a good book, I go someplace I haven't been to for a while, I go talk to someone to vent or to hear how things are going for THEM.... currently I've been walking around and checking out Xmas light decorations...

I guess, do whatever gets your mind off your situation for a bit and then come back/attack the situation with a new aggression.