@at@sigmoid.social The desktop is a good idea.
I've noticed a similar trend with the "hard to stop.” Sometimes I grant myself one “nighttime game," which is typically something simple like Spades or Backgammon. Eventually something that should be a less than 10 minute investment turns into an hour or more as I'm “chasing the win.” My dedication is not rewarded; I end up playing worse because I'm tired.
I like your idea of “practicing quitting in the middle.” My wife suggested this for TV shows/movies, too.