My biggest trigger is rudeness. I get very upset. I don't know how to respond to rudeness, because I am very polite. Rudeness shocks me and I become angry and depressed. Too often when I experience that, I will fire off an email that I later regret. For year and years, I have tried not to instantly react. But it happens so rarely that so far, all my best laid plans fail. Well, at least I think I don't make angry phone calls anymore! So that's progress.