Life's Greatest Lessons: 20 Things That Matter
by Hal Urban

You Are Your Choices: 50 Ways to Live the Good Life
by Alexandra Stoddard

100 Simple Secrets of Happy People: What Scientists Have Learned and How You Can Use It
by David Niven

How to Retire Happy, Wild and Free: Retirement Wisdom That You Won't Get from Your Financial Advisor
by Ernie J. Zelinski

What Happy People Know: How the New Science of Happiness can Change Your Life for the Better
by Dan Baker, Cameron Stauth

The Art of Happiness: A Handbook for Living
by Dalai Lama, Howard C. Cutler, Bstan-'Dzin-Rgy

Stumbling on Happiness
by Daniel Todd Gilbert