I mentioned a few months ago that I was going to record what I accomplish each day for 100 days. I managed to turn it into a habit (big deal for me- I find habit forming difficult) and started my second spreadsheet (I changed the way I "grade" my achievements, and made various upgrades to the system) and am about halfway into it! :D That combined with journaling every night gives me an estimation of why I get into depressive spirals where I don't do any work, and helped me figure out what gets me out of them (where I end up completing a lot of work.)

It's also gratifying to see a high score after doing several hours of work.