Not strictly related to procrastination, but the "just one tooth" method didn't work for me. Stuck with it for a few weeks, and then my motivation just tapered

Not strictly related to procrastination, but the "just one tooth" method didn't work for me. Stuck with it for a few weeks, and then my motivation just tapered off. What worked was permanently bundling flossing with brushing. That meant that if I _really_ didn't want to floss I didn't have to, but then I also had to skip brushing. Not brushing feels gross to me, which is why I think it worked. There are now a few nights a year where I don't brush my teeth... but overall it's a huge win.