1. Jokes.
“Happiness is good health and a bad memory.”
basicjokes.com
"A man can be happy with any woman whereas he does not love her”. Oscar Wilde
proverbia.net
A pun, or paronomasia, is a form of word play that deliberately exploits ambiguity between similar-sounding words for humorous or rhetorical effect. en.wikipedia.org
I found a web about puns but it hasn’t a category specific for happiness, only one about Medical and Health.
This is one pun of it: “A pessimist's blood type is always b-negative.”
http://www.punoftheday.com/
2. Happiness.
There are a lot of webs about happiness, in my first search the result is about 12.000.000 results in Spanish and 289.000 pages in English (Google.es) but usually the happiness webs in Internet is about psychology, self-helps, blogs, sentences, astrology, the Coca-Cola publicity, etc.