There are times I hear voices say I did a job well done, or that I should treat myself when I do well after the game. They always keep me calm and relaxed,  and sometimes I feel like I can do anything, even help others.
On the other hand, I often hear voices tell me that I should beat myself up, or even blast myself in the head.  It annoys me to no end, and they never stop when I tell them to when I do poorly after the game.  It's like I went to hell inside my mind, sometimes even venting my frustrations online.
So when that happens I try listening to music, watching anime, TV shows, or movies that I can always guarantee will make me feel great after watching them, or I concentrate on making custom loops of some of my favorite music (new hobby of mine). in the hopes I can drown out the noise.  And on the occasion I'm playing late at night, I always listen to "Blue Fields" from Final Fantasy VIII to help me go to sleep after the game.
Then there's those expensive "role-playing" games.  I've only played two with a mistress, but I never felt bad losing.  A strange and soothing experience, those games are. I look forward to the day I come out winning.
So yeah, that sums me up.