I just stopped and took a second and it made all the difference. My mind can usually come up with things very quickly and my biggest problem when I get upset is that I don't slow my mind down at all. It jumps from one thing to the other, always getting more and more pissed off. Today I interrupted my mind by forcing it to focus on one thing, my little stone frog that I keep on my desk. By allowing it only to focus on the little frog my anger dissipated.
I took a deep breath and moved on. Sure I am still pissed off about some stuff, but it's nice to not get controlled by that anger.