Hi Little Buddha, wow it looked like you’ve been reading over my shoulder when I read your post. I can identify with your situation.
Some of the things that are working for me are ACT (acceptance and commitment therapy) especially the writings of Russ Harris, meditation for at least 25min (it’s amazing how it clears my mind of the static and gets it working on my problems) and writing my thoughts when I’m in a good mood or confident about something. I also agree with all of Pooch’s comments but when I tried to write down the negative stuff it seemed to reinforce it rather than help me distance it.