You can change your personal capacity for happiness. Research psychologist Sonja Lyubomirsky's pioneering concept of the 40% solution shows you how.
"Finally we have a self-help book from a reputable scientist whose advice is based on the best experimental data... The How of Happiness is smart, fun, and interesting - and unlike almost every other book on the same shelf, it also happens to be true."
-Daniel Gilbert, Harvard University professor of psychology and author of Stumbling on Happiness

"A guide to sustaining your newfound contentment." 
-Psychology Today

"Lyubomirsky's central point is clear: a significant portion of what is called happiness . . . is up for grabs. Taking some pages out of the positive psychology playbook, she coaches readers on how to snag it."
-The New York Review of Books

"Is lasting happiness attainable or a pipe dream? For the last eighteen years, University of California-Riverside professor of psychology Sonja Lyubomirsky has studied this question, and what she reports might even sway pessimists."
-U.S. News & World Report

"The right place to look for science-based advice on how to become happier."
-Martin Seligman, author of Learned Optimism