I've found 2 things that help really well:
1: Start up Assassin's Creed 2, play Don't Stop Me Now from Queen and start murdering tons and tons and tons and tons of guards. It's so easy, and the counter/combo animations are so satisfying.
2: Start up L4D2, start a singleplayer campaign on easy, and murder lots and lots and lots of zombies. Very good stress reliever.
1: Start up Assassin's Creed 2, play Don't Stop Me Now from Queen and start murdering tons and tons and tons and tons of guards. It's so easy, and the counter/combo animations are so satisfying.
2: Start up L4D2, start a singleplayer campaign on easy, and murder lots and lots and lots of zombies. Very good stress reliever.