Centenarians reveal secrets to long and happy life.

Dr. Gladys Taylor McGarey, a 102-year-old doctor and co-founder of the American Holistic Medical Association, shares her secret to a long, happy, and purposeful life. She believes that the happiest and healthiest people are those who can let go of things that no longer serve them. Her mother taught her an easy way to release things that don't matter, and she has adopted this practice for years. She encourages people to identify something that feels stuck in their life, hold it in their hand, and then let it go. The happiest people know when it's time to move on and let go of regret.