Right, but breaking down tasks after "activating" the task probably isn't very useful. Doing the one tooth thing doesn't really help since once you are already there, the gap between doing that and the rest of the teeth is basically nonexistent. You might as well start off flossing all your teeth if you are able to get to the flossing part. Breaking down activation energy is also hard. Taking floss out and putting it on the counter feels like it might not be reinforcing enough. Something more useful might revolve around storing the floss in a more readily available position or using something like floss picks and/or other things that might reduce friction. But ultimately, I think everything eventually boils down to raw discipline.