I swear it is some sort of cosmic law that on the days I plan to get a lot of work done, there will be some sort of mini-crisis that prevents me from doing so. It happens every, single time. Fortunately, I got more done on the weekend than I'd planned. I'd planned to do no work at all on the weekend, and got a few chapters revised.
Maybe that's the trick - tell myself I'm not going to get anything done instead of thinking I will.