Nicol Sorenson-Legakis brought this seasonally-appropriate little article to my attention:
http://www.npr.org/sections/health-shots/2015/11/23/456656055/gratitude-is-good-for-the-soul-and-it-helps-the-heart-too?utm_source=facebook.com&utm_medium=social&utm_campaign=npr&utm_term=nprnews&utm_content=2049
Posted from Marbella, Spain