Look at the criticism section of the Wikipedia page of ego depletion (the term for finite quantity of willpower): https://en.wikipedia.org/wiki/Ego_depletion#Re

Look at the criticism section of the Wikipedia page of ego depletion (the term for finite quantity of willpower): https://en.wikipedia.org/wiki/Ego_depletion#Reproducibility_controversy_and_conflicting_meta_analyses https://en.wikipedia.org/wiki/Ego_depletion#Reproducibility_... Like most things the true is probably somewhere in between and the effect is probably there, just not as strong as the original publication implied. Sprinkle a bit of placebo effect on top of that and that could lead to people (e.g. you) using the concept of ego depletion with a lot of success.