Eating "healthy" has been sabotaging my gamedev. It's bad for the soul.
My creative output and motivation and drive have increased dramatically since I started enjoying good food. And by good food I mean very bad very tasty food.
But that's because (I)'m motivated by food. Whatever (You)r vices are and whatever you're wasting your energy resisting every day, try indulging in them and see if they will help you make a better game or at least make gamedev better even if the game will be the same flop it would have been in any case.