[cookiecaper]

The principle is that you have to maintain health.

I think late-night coding is a near-constant because of our brains automatically optimize us onto what pg describes as "the Maker's Schedule". Context switching is anathema to effective coding, so people automatically go to the time when they'll be least-interrupted, which is when the rest of the world is asleep.

[gressquel]

You also need to maintain a social life and relationships with family and friends. It will boost the productivity more than you believe