The self-care is indeed a good point. I sometimes find it difficult though, because when I'm angry I have a hard time being compassionate even towards myself. One thing that does kind of help for me is to watch some stand-up comedy, especially dark humor. With that I can sort of let out some of the anger and sometimes turn an angry mood into just a really sarcastic one, which maybe isn't a lot better but at least it's not quite as exhausting.

I used to actively seek out blogs and such about whatever I was angry about, and just ruminate on it and get even more angry. I try not to do that anymore. I don't even watch the news anymore because it gets me too worked up. Usually it's just more of the same misery anyway, and the few times that something really important happens I'll hear it through the grapevine. That was probably one of the best decisions I've ever made for my peace of mind.