anger is the easiest of all the emotions to get caught up in, and is a key player in depression. The system I follow when battling depression is to first recognize that I'm in it, the tell-tale signs are negativity. The red flag is what comes out of your mouth, pay attention to that. Are you complaining alot? About other people, circumstances, f this and f that...you get the picture. Pay attention as well to what you say even when you're alone, it all counts. Words we speak hit us hard, and help contaminate our perspective, which is one of the biggest players in personal depression. A contaminated perspective causes us to appear to others as angry, sometimes irrational. And it takes a force of will, consistency, and patience to fight off depression. When I find myself battling it, I watch what I say like a hawk, and stop myself if I'm about to complain or make negative comments. This isn't easy, but if you keep at it, you find yourself actually feeling better in a few days. You also break the cycle of speaking that way......until the next time of course and then you have to start the process again.
Don't feel bad, everyone deals with depression from time to time. It only becomes a problem when we don't deal with it, the right way.