1. A primer in positive psychology, 2006, by Christopher Peterson.
2. The how of happiness: A scientific approach to getting the life you want, 2007, by Sonja Lyubomirsky.
3. Authentic happiness, 2004, by Martin Seligman.
4. Positive psychology in a nutshell (2^nd Edition), 2006, by Ilona Boniwell.
5. Positive psychology: The science of happiness and human strengths, 2004, by Alan Carr.
6. Happiness: Unlocking the mysteries of psychological wealth, 2008, by Ed Diener and Robert Biswas-Diener.
7. Flow: The psychology of optimal experience, 1991, by Mihaly Csikszentmihalyi.
8. The happiness hypothesis, 2005, by Jonathan Haidt.
9. Positive psychology in practice, 2004, by Martin E. P. Seligman, P. Alex Linley, and Stephen Joseph.
10. Positivity: Groundbreaking research reveals how to embrace the hidden strength of positive emotions, overcome negativity, and thrive, 2009, by Barbara Fredrickson.

Ten empirical research findings from Positive Psychology research:

1. Optimistic people are much less likely to die of heart attacks than pessimists, controlling for all known physical risk factors (Giltay et al., 2004).
2. Women who display genuine (Duchenne) smiles to the photographer at age eighteen go on to have fewer divorces and more marital satisfaction than those who display fake smiles (Keltner et al., 1999).
3. Positive emotion reduces at least some racial biases. For example, although people generally are better at recognizing faces of their own race than faces of other races, putting people in a joyful mood reduces this discrepancy by improving memory for faces of people from other races (Johnson & Fredrickson, 2005).
4. Externalities (e.g., weather, money, health, marriage, religion) totaled together account for no more than 15% of the variance in life satisfaction (Diener et al., 1999).
5. The pursuit of meaning and engagement are much more predictive of life satisfaction than the pursuit of pleasure (Peterson, Park, & Seligman, 2005).
6. Economically flourishing corporate teams have a ratio of at least 2.9:1 of positive statements to negative statements in business meetings, whereas stagnating teams have a much lower ratio; flourishing marriages, however, require a ratio of at least 5:1 (Fredrickson & Losada, 2005; Gottman & Levenson, 1999).
7. Self-discipline is twice as good a predictor of high school grades as IQ (Duckworth & Seligman, 2005).
8. Happy teenagers go on to earn very substantially more income fifteen years later than less happy teenagers, equating for income, grades, and other obvious factors (Diener et al., 2002).
9. How you celebrate good events that happen to your spouse is a better predictor of future love and commitment than how you respond to bad events. (Gable et al., 2004).
10. People experience more "flow" at work than at home (Csikszentmihalyi & LeFevre, 1989).

(findings provided my Martin Seligman)