<p><b>The first major study of gratitude that shows how “wanting what we have” can measurably change people’s lives.</b></p> <p> </p> <p>Did you know that there is a crucial component of happiness that is often overlooked? Robert Emmons—editor-in-chief of the<i>Journal of Positive Psychology</i>—examines what it means to think and feel gratefully in<i>Thanks</i>! and invites readers to learn how to put this powerful emotion into practice. Scientifically speaking, regular grateful thinking can increase happiness by as much as 25 percent, while keeping a gratitude journal for as little as three weeks results in better sleep and more energy. But there's more than science to embrace here: Emmons also bolsters the case for gratitude by weaving in writings of philosophers, novelists, and theologians that illustrate all the benefits grateful living brings. </p>