I'm at my computer for 8 hours. I can't be productive anywhere close to that amount of time, and it's been that way forever. Once in a while I'll have a spike o

I'm at my computer for 8 hours. I can't be productive anywhere close to that amount of time, and it's been that way forever. Once in a while I'll have a spike of 1 - 7 days where I can sit and bang out code 12 hours a day. This is usually the culmination of some long period of rumination that grows into an understanding of some large task that I finally just sit and knock out. After that, I'm weary and I have to rest (for 3 months).