Lessons from Sheryl Sandberg: Stop Working More Than 40 Hours a WeekThere's been a flurry of recent coverage praising Sheryl Sandberg, the chief operating officer of Facebook, for leaving the office every day at 5:30 p.m. to be with her kids. Apparently she's been doing this for years, but only recently "came out of the closet," as it were. What's insane is that Sandberg felt the need to hide the fact, since there's a century of research establishing the undeniab
