A lot of entrepreneurs onstage have been bragging about not sleeping, telling their audiences about their 16-hour days, and making it sound like hustle-at-all-costs is the way ahead. Rest be damned, they say — there’s an endless amount of work to do.
Being tired isn’t a badge of honor
Jason Fried

I tend to be skeptical of claims of working 16 hour days. Maybe if you count checking email or other admin tasks as work, sure. I’m a writer and editor. A three- to four-hour focused session of work is a lot. If I get two sessions in a given day, I win. If you can truly focus and do real work for 16 hours at a stretch, my hat is off to you, superhuman.