I guess I have found I do not know what willpower even means. Does it mean that I do not change my mind, once I have set upon some course of action? So I say, well, I'm going to climb Everest naked. And then I don't update based on damage from rock and cold to my extremeties. I just keep climbing. That is willpower?
Because if I can change my mind about what I want to be doing well then, I guess I will. Oh I need to write this document for work that is already overdue. Hmm well its pretty boring, let me go see what people are saying on LW. Is that a lack of willpower, or did I change my mind about what I wanted to be doing?
I got the impression that D_Malik was using the word to indicate a lack of akrasia: i.e. a perfect ability to undertake tasks believed to be in your best interests, without limitation by boredom, distraction, procrastination, etc.
For the past few years my willpower has been steadily increasing. If it lasts and I use it to accomplish something noteworthy, I might write a post about it.
Anyway, what should a rational preference utilitarian with infinite willpower do? Assume that there are no negative effects (unhappiness, stress) with using this willpower, and that they can control their emotions at will.
Clearly they should work a lot more, not spend time on recreation (movies, TV, games), stand instead of sitting, etc..
What else? Should they listen to music? Should they keep their muscles flexed 24/7 ? What should they learn, where would they have the most relative advantage? How much time would be worth spending on social interaction?
I can figure out these things on my own, but those questions are important and good ideas are very valuable.