I thought I had it worked out. I went to see a therapist. She gave me a rubber band to put on my wrist and told me to give myself a light snap whenever I think a depressing thought. This exercise is mostly about making one aware of how often they think negatively. Next once your aware I was told to identify the thought itself and evaluate it. The goal being to dismiss the thoughts that groundlessly depressing and self imposed.
So I did. I was skeptical but I tried it. It helped. Or at least it seemed to.
For no reason that I could identify my depression seethed back up. When I first started the rubber band therapy I noticed a decline in it. My brain was able to sort of heal itself with it's own thinking.
"Hey, your thinking sad thoughts," it'd say. "Lets' not do that anymore."
But then it just stopped working and I don't know why.