Everyone has an opinion, anecdote, or horror story about powerful women in successful careers. But instead of relying on scattered stories, time management expert Laura Vanderkam decided to get some hard data.

Looking at time-logs of 1,001 days in the lives of women who make at least $100,000 a year, Vanderkam found some surprising patterns: these women slept more than they thought, went to the gym, played with their children, and had lunches with friends. With examples from hundreds of women I Know How She Does It proves that you don't have to give up on the things you really want and offers specific strategies to help you build a life that works, one hour at a time.