10% Happier with Dan Harris Folgen

Psychiatrist and addiction expert Judson Brewer was researching better treatment options for alcohol and cocaine addiction patients and found, through clinical studies, that meditation could significantly help break these behaviors or "habit loops" and prevent relapses. Brewer, who is now the director of research at the University of Massachusetts School of Medicine's Center for Mindfulness, founded a company called Claritas MindSciences, which uses neurofeedback techniques combined with mindfulness exercises for several conditions, from eating disorders to smoking addiction.

Tibetan Buddhist monk Matthieu Ricard, who is originally from France, earned the moniker "world's happiest man" after brain scans taken during a neurological study on meditation (led by Dr. Richie Davidson) showed excessive activity in his brain as he meditated on compassion. A staunch vegetarian, Ricard talks about the importance of extending compassion to all beings, including animals, which he lays out in his new book, "A Plea for the Animals: The Moral, Philosophical, and Evolutionary Imperative to Treat All Beings with Compassion."

Mary Karr has shared many dark pieces of her past in her memoirs, from a painful childhood, to a long struggle with alcoholism and depression, to living her entire life as an agnostic before becoming a Roman Catholic. It was when she said she found herself "sober in a mental institution" that she first began to pray and meditate, both of which are practices she continues today to stay centered.