Zen. What calms you down?
That all depends. How worked up am I to begin with?
Typically I take the bitch route: Keep bitching about it until I feel better. This isn't the recommended route to take as I'm sure it thoroughly annoys plenty of people. But I honestly feel as though the more I talk about it, the less sense it makes and the less I care. My mom is always a really good sport about it...even when she's not truly listening, she lets me bitch it out and I'm all better.
Another method I like to use is the sleep method: Sleep for a few hours and wake up feeling like a grand new woman. You know the "high" feeling people supposedly get from running? (I wouldn't know because I'm fat, lazy, and wayyyyy out of shape...but I've at least HEARD of it!) That's the same kind of "high" I get from napping. Don't know what it is...but I sure do love it.
Sincere apologies to those that have endured my bitching. I swear it's for a good cause. In the meantime, look at how adorable I am when I'm snoozing with my kitty! :)