My comment might not fly well with the long hours startup crowd here, but is 8 hours of intense work not enough for one day? I imagine most people would feel dr

My comment might not fly well with the long hours startup crowd here, but is 8 hours of intense work not enough for one day? I imagine most people would feel drained after working for that length of time (and 8 hours is quite a long time to pay attention to any given thing. Skeptical of the ADD diagnosis...). Perhaps your body is trying to tell you something, that it's time to do something other than work. But I guess if you need to be working 14 hours/if you don't have a choice, then do what you gotta do.