My brain is a never-ending stream of "I should be doing this." I need to get out more. I need to find more people around my age. I need to start making more friends. I need to write more, I need to stop writing my blog posts last-minute (it's Tuesday night right now, and my blog post comes out seven hours from now). I need to go back to volunteering at the shelter, apply to more jobs. I need to do this, I need to do that.
After my internal monologue about the things I ought to be doing, guess what usually happens? I don't do it. "I'm not in the mood to write at the moment," I say. "I'll do it at a better, more convenient time," I tell myself. On and on it goes, and I don't do stuff half as much as I feel I should. On top of that, as my general mood gets worse, my desire to do things decreases. There are times when I just don't feel like doing anything.