Structured, disciplined, habits make you far more productive than working long hours. At an old job (natl. lab) there was a guy who does his research job for,

Structured, disciplined, habits make you far more productive than working long hours. At an old job (natl. lab) there was a guy who does his research job for, maybe, two or three hours a day. The rest of the day he is reading unrelated books. But those three hours are so productive that by March he has filled his employer's scientific paper quota. His managers hate him because they see his fucking around 70% of the time, but by any performance metric (especially quality. His papers are the consequential ones)he's blowing everyone away.