Thanks for sharing. I especially liked the leaving tasks 90% done. This is motivation for someone who has 1000 unfinished side projects to finish one tomorrow :)
In my case it often backfires in the form of a sudden decision, right or wrong, that yesterday-me made a bunch of bad decisions about something so they all need to be revisited. Before I know it, the thing that was 90% complete is now 60% complete.
Yeah, this one works incredibly well for me as well, and wasn't at all obvious until I saw it for the first time a few years ago.