I think that a good idea would be to start tracing the source of your rage. It's coming from somewhere, and it's being misdirected.

Also, I typically know that something is up with me when I am thinking that I am "just fine" or what have you. Odds are, I'm not. So, when I start insisting to myself and others that I'm all okay, I've learned to catch myself and see what is really going on. It's a work in progress, but I'm getting there.