10% Happier with Dan Harris Folgen

Born and raised in India, Sadhguru says he spent his childhood and adolescence as a "super skeptic" who didn't grow up "with anything spiritual or religious." He spent his days crisscrossing the country on his motorcycle, he launched successful businesses, but then he had an experience in his 20s that changed the direction of his life forever. Sadhguru is now a world renowned yogi and mystic who talks about how ancient yogic practices can be relevant and helpful in contemporary times. He's the founder of the Isha Foundation and the author of "Inner Engineering: A Yogi's Guide to Joy."

Fewer than 50 people have accomplished the Explorer's Grand Slam, a challenge of summiting the highest peaks on each of the seven continents and completing treks to the North and South poles. Colin O'Brady not only completed the EGS this summer, he shattered the world record for it, finishing in just 139 days. O'Brady also set the world record for climbing the seven summits -- summiting Kilimanjaro in just 11.5 hours. Five years ago, a friend suggested he try mediation and recommended a 10-day silent vipassana retreat. At first O'Brady said he looked at meditation like an elite athlete, hoping to train his body and mind for peak performance, but soon discovered meditation gave him a much greater benefit for his daily life.

Duncan Sheik first made a name for himself in the mid-90s with the hit song, "Barely Breathing," and has since reinvented himself as a Broadway composer. He won two Tonys and a Grammy Award for music he composed for the smash Broadway hit, "Spring Awakening," and he also composed music for Broadway's "American Psycho." But when Sheik first started out, performing on stage made him very nervous and it wasn't until he was introduced to Nichiren Buddhism, which involves the practice of a form of mantra meditation, that he got over his fears.