Write a poem about it; go out with a friend, or at least call one; round up some peeps on chat here; start researching something that has had an interest for you but you've never taken the time to see if you can really do it or not; CAREFULLY do a bit of shopping; go help someone else who has it worse off than you......
I vote for Chileaddict's suggestion.....it just sets ya right! But go for the old school stuff - when they really knew the blues! If that doesn't do the trick,,,look in the mirror and say "Thank You" 7 times....try it for S&Gs!!!!!! xo!