According to a recent Harvard study a 90-minute nap can produce as much improvement in memory and learning as a full night's sleep. Even very brief naps can be effective. (Just don't wake up after 20 minutes and before 90, or you'll be interrupting deep sleep.)
Credit: Mladen Mitrinovi / Getty Images
Powered By ZergNet
The Best Tools, Tech & Toys for 2015
Plus: The World's Most Efficient Workout
ON NEWSSTANDS NOW
Martin Short's Life Advice
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.