Postal 2 or the original Carmageddon. Yes, I know
someone is going to say I'm an insane freak for playing Postal 2, but it really does bring some catharsis as poorly made as it is sometimes... Nothing blows off steam like blowing up a gas main, watching the chaos while throwing boomerang machetes and throwing cats that eat people up.
Carmageddon, its my favourite arcade style racing game and its good for blowing off steam... Bashing into cars and of course pedestrians is fun even if it is in poor taste (Heh, both these games are in VERY poor taste...)
Outside of the realm of video games, The Moody Blues really cool me off. Take some herbal tea and pull my ancient (But in near perfect condition) vinyl of "Days of Future Passed" (One of the greatest records EVARR, btw) out and put it on mah fancy diamond cut needle, that can cool me off. They're awesome, either way, but they're really great for mellowing you out.
"I think.
I think I am.
Therefore I am!
Of course you are, my bright little star...
I'm miles and Miles of files, pretty files of your forefathers fruit,
and now to suit our GREAT COMPUTER...
You're magnetic Ink
I'm more than that.
I know I am.
At least, I think I must be.
There you go man, keep as cool as you can.
Face piles of trials with smiles.
It riles them to believe that you perceive the web they weave.
And keep on thinking free."
Yeah, I know that the moody blues don't make sense, but whatever... I still love the stuff they come up with.