Pet mah kitteh...
masturbate
"Where we have strong emotions, we're liable to fool ourselves."-Carl Sagan
Watch Modern Family (or some other funny show
I drink Coke and play Heroes of Newerth.
I listen to classic rock music, usually. Just do something fun to distract yourself from thinking about whatever it is.
I usualy just go to bed, if i can sleep i do that, else i just watch tv in bed. normaly goes over in not to much time.
When I'm sad I like to go sit in my bathtub, turn the shower on, and cry pretending that i'm sitting out in the rain while listening to sad music.
I listen to sad and melancholic music, enjoy rainy and cloudy weather. Prefer foggy one if possible. I simply embrace my sadness. I also read books/play some games. Usually helps within hours but sometimes lasts few days in a row.
I think it's healthy for me to have that times. When they pass I have new energy and feel cleansed.