I can't count the number of times I stayed up late chasing a bug, only to have it be something so simple that I would've caught it in 20 minutes or less if I'd

I can't count the number of times I stayed up late chasing a bug, only to have it be something so simple that I would've caught it in 20 minutes or less if I'd just gotten a normal amount of sleep and looked at it the next morning. You just get slower and slower as you stay up, until you're sitting there staring at the screen for 5 minutes before you remember what you're doing. Any lack of sleep at all will also cost you in productivity the next day. By having discipline to let it be, you can spend 20 minutes on it the next day instead of hours on it tonight and messing up your productivity all day tomorrow.