Habitual Productivity

[I]n the end, there wasn't really a compromise. The productivity side just flat-out won: I eventually realized that human interaction is necessary for mental health and that a solid social network is invaluable. I don't mean to imply that I engage in social interaction because I've calculated that it's necessary: I really do enjoy social interaction, and I really want to be able to enjoy it without guilt... I've found an excuse that allows me to both enjoy myself and sate the thirst. That said, it's still difficult for me to disengage sometimes.

The mechanics of my recent productivity

[T]his stint was rough. I experienced far more stress than my norm. I lost a little weight and twice caught myself grinding my teeth in my sleep (a new experience). There were days that I became mentally exhausted, growing obstinate and stubborn as if sleep- or food-deprived.

How I Am Productive (Miscellaneous extreme regimentation)

There are other posts that give me this impression, but I can't find them right now. Also, the "optimal sleep" posts seem to be all about how to sleep as little as possible to be as productive as possible.