sleep and happiness

By: Rachael Rettner Published: 03/02/2015 07:27 PM EST on LiveScience The survey of more than 7,000 U.S. adults revealed
As a result of my happiness project, I've become a sleep zealot. It's just so obvious to me -- from reading the research and from personal experience -- that getting enough sleep is a key to a happier life. I've noticed something, however: Most adults don't give themselves a bedtime.