There's a balancing act here -- trying to maximize your output today can cost you in your output tomorrow. Everyone knows you can overdo things physically; you

There's a balancing act here -- trying to maximize your output today can cost you in your output tomorrow. Everyone knows you can overdo things physically; you can also burn out mentally. If I stay up until 6 am chasing this one bug, either tomorrow I will be too tired to concentrate or I'll sleep in and mess up the rest of my schedule... been there a lot.