When he was asked what else he did when he was stuck, his answer was: “Well, writing other books. I always work on different manuscripts at the same time. With this method, to work on different things simultaneously, I never encounter any mental blockages.” (Luhmann, Baecker, and Stanitzek 1987, 125–55)
use the slip box to "hold your place" while you work on other (writing) projects. this allows you to follow the momentum. remember Raven Oak's website and where she is on multiple manuscripts.