Additionally, here is a link to a great article about the science of happiness. It was a recap of Hank Smith's comments at BYU Educational week. Hank Smith is a great instructor. I heard him speak to youth in a meeting earlier in the year. He was funny and entertaining. More importantly, he is intelligent. His Ph.D. study, as I recall, was on the science of happiness.
Here's the link: http://m.deseretnews.com/article/865610715/The-Science-of-Happiness.html?pg=all%3Fref%3Dhttps%3A%2F%2Fm.facebook.com