Seriously, this. The first thing I do when my depression gets bad is drop the internet like a hot potato. When my PPD triggered long-term depression (or vice versa, not sure which was the egg and which the chicken), I stayed out of interacting for months. But sometimes it's hard to figure out that I need to step back until I do something that needs stepping back from.

Lucky for me, I figured out a personal twenty- four hour rule relatively early on. If I get into something and it bothers me or is still upsetting me or pissing me off twenty-four hours later, I know something is wrong with me above and beyond whatever it is I'm arguing about on the internets.