Kaplan is the author of many popular books including the New York Times bestseller The Gratitude Diaries and her new book What Your Body Knows About Happiness. She is the former editor-in-chief of ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. We have three "brains." They are located in the head, the heart and the gut. These three ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Hannah Frye Hannah Frye is a writer covering beauty and style. When people ...