Shawn Achor

Harvard Professor, Researcher & Positive Psychology Expert; Author of "The Happiness Advantage" and "Big Potential"

Shawn Achor on happiness as a competitive advantage

Alexa von Tobel

Founder & CEO of Learnvest.com; New York Times Bestseller Author of "Financially Fearless"

Amory Lovins

Co-Founder & Chairman Emeritus of Rocky Mountain Institute

Giuliana and Bill Rancic

Stars of the reality TV show "Giuliana & Bill" on Style Network

Andie MacDowell

Actress Known for "Four Weddings & a Funeral;" Heart Health Activist

Andy Cohen

Host & Producer of Bravo’s "Watch What Happens: Live;" Former EVP of Development & Talent at Bravo

Archie Manning

Former NFL Great & Ambassador of Goodwill

Ben Stein

Political Economist, Commentator, Author & Actor

Benjamin Zander

Conductor of the Boston Philharmonic Orchestra; Celebrated Leadership & Performance Expert

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

The mind-blowing science of black holes

Dr. Jill Bolte Taylor

Scientist, Author & CEO of My Stroke of Insight, Inc.

Carla Hall

Celebrity Chef & Former Co-Host of "The Chew"

Carla Hall Talks About Her Arrest

Danny Meyer

Founder, Shake Shack

Danny Meyer: How to Use Hospitality in Business to Gain and Keep ...

Viola Davis

Academy Award-Winning Actor, Producer & Philanthropist

Viola Davis Opens Up About Surviving Childhood Poverty, Her ...

Davis Guggenheim

Director and Producer, "He Named Me Malala", "An Inconvenient Truth", and "Waiting for Superman"

Professor Richard Dawkins

English Ethologist, Evolutionary Biologist, Charles Simonyi Professor of the Public Understanding of Science, New College, University of Oxford

Dom Sagolla

Co-Creator of Twitter; Author of "140 Characters"

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Dr. Tererai Trent

Internationally Recognized Voices for Quality Education and Women’s Empowerment; Oprah Winfrey's "All-Time Favorite Guest"

Dr. Tererai Trent: How To Achieve Your “Impossible” Dreams

Ree Drummond

Host of "The Pioneer Woman" on the Food Network