en.wikipedia.org/wiki/Happiness (a free encyclopedia).
http://www.filmaffinity.com/es/film398445.html (a site about films, this one called "happiness").
http://www.time.com/time/2005/happiness/ (An article about happiness from Time magazine).
worlddatabaseofhappiness.eur.nl/ (Inventory of empirical findings on happiness that prepares for research synthesis).
http://www.happiness.com/ (A magazine guide-line to make you last your happiness forever).