For me, the sustainable amount of productive time I can put in each day is much less than the number of waking hours I have. Sure - I'll readily admit that I'm

For me, the sustainable amount of productive time I can put in each day is much less than the number of waking hours I have. Sure - I'll readily admit that I'm below that limit most of the time. BUT - back when I didn't realize this concept, I'd read all these productivity blogs, track my time, and end up feeling tired and burned out within a week. A computer is the most "productive" use of my unproductive time.