Thrive: Finding Happiness the Blue Zones Way by Dan Buettner (MP3 ) 305 pgs

Amazon: What makes us happy? It's not wealth, youth, beauty, or intelligence, says Dan Buettner. In fact, most of us have the keys within our grasp. Circling the globe to study the world's happiest populations, Buettner has spotted several common principles that can unlock the doors to true contentment with our lives.