mood swings getting the best of me

For me, I try to get away from whatever is pissing me off. Like go outside for fresh air, walk away from the annoying person, or, if the anger-inducing person is virtual, leave the computer for a few minutes.
I also try to keep in mind the fact that I'm angry, and whatever I say/do I'll regret later.
If I'm SUPER angry I might listen to music that will eventually cool me off or get physical (usually throwing my phone, hence why it gets broken so often).
Lol. Sorry, I'm not really the best person to ask about not having mood swings.

On a more serious note, are you bipolar? If mood swings like that happen to you often, get that checked out.

On a less serious note, I honestly can't handle my anger that well. I try not to show my emotions in real life but I can blow up or get overly irritated at people for the tiniest things they do. I'm generally always gloomy though. Music helps. Music cures everything.