For anyone who is not taking Positive Psychology, but who is nonetheless interested in either being happy or research into happiness, I've uploaded some articles that may interest you:

http://www.wjh.harvard.edu/~moulton/happiness1.pdf
http://www.wjh.harvard.edu/~moulton/happiness3.pdf
http://www.wjh.harvard.edu/~moulton/happiness4.pdf

Although it may come as a shock to some, money does not make people happier. Simple acts of gratitude or altruism do, however.

Also, for those interested in happiness or the intersection between psychology and economics, I encourage you to check out the upcoming lectures at Harvard featuring Nobel Laureate Daniel Kahneman. More info can be found here:

http://mbb.harvard.edu/content/resources/Kahneman.jpg

Your tutor in Psychology,
Sam