FPS are my best friends. Nothing like going 40 and 14 in a Team Deathmatch on Overgrown in CoD4 to cheer you up.
And in the rare event that doesn't work, I go play Call of Duty 4 on hardcore mode and teamkill everyone for laughs (I've probably made a lot of enemies that way). That method has yet to fail.
"Don't fix what isn't broken; Just upgrade it."