I’m quite interested in gamification options - as you say, you do need to change your “tricks” every now and again, as they can stop working.

Many years ago, I used to use a thing called “Habitica” (wiki link) which was sort of like playing your task list as an RPG, which I think worked well for me for a little while. Looks like it’s still up and running though, so might be worth a look :)