You can't reliably get more stuff done by working longer hours. All that does is burn your long-term resources for short-term gain - and even that it does badly

You can't reliably get more stuff done by working longer hours. All that does is burn your long-term resources for short-term gain - and even that it does badly, since you can quickly start stacking up mistakes. If you need to get more done, you have to be efficient about it.