Wow, that link is really interesting. Especially this bit:

I was, once again, pondering the question of why I didn't have any mental energy, and I tried thinking about the occasions when I did find mental energy. It occurred to me that when I started a new project, my energy level went up briefly before crashing. Maybe, I thought, energy was produced by new ideas. And that's when the light went on. "Maybe both the genius and the energy deficit were produced by overloading a single force, the force that resists thoughts moving repeatedly in the same channel." (24). And then I thought: "Maybe that's why my genius isn't an evolutionary advantage."

I don't know if that hypothesis is true, but if it is, I probably have a mild version of it. It would explain a lot about my akrasia issues.