CEO Trust speaker, Harvard-trained researcher and author Shawn Achor was featured recently on a Super Soul Sunday episode with Oprah Winfrey.  In his appearance, he explains how sending one simple email a day, for 21 days, has been proven to increase happiness and may even extend your life.  "Write a two-minute email, or tweet, or Facebook message, or text message praising or thanking one person you know," Achor says. "It's so simple. Two minutes. It's usually two or three sentences, and you do a different person for 21 days."  Phone calls or face-to-face contact is even better.

Shawn researches and teaches about positive psychology. He's one of the world's leading experts on the connection between happiness & success, and his TED talk is one of the most popular all time with over 3.8 million views.