Sleep. An understated, under-used path to greater productivity? I called it out as one of the five ways to 'Fire up your intuition' in my book. Ignore it at your peril. Adopt it to take one step closer to being super-productivity.
I nudge to you listen to what Matt Walker has to say. He is a brain scientist to studies this subject.
https://www.ted.com/talks/matt_walker_sleep_is_your_superpower?rid=SbU434x6glXT&utm_source=recommendation&utm_medium=email&utm_campaign=explore&utm_term=watchNow