Found 2 comments on HN
Tekhne · 2014-08-14 · Original thread
mfalcon · 2011-06-10 · Original thread
Happiness, by Riccard Mathieu[0]. He gave an introductory talk at google too[1].

[0]http://www.amazon.com/Happiness-Guide-Developing-Lifes-Impor...

[1]http://video.google.com/videoplay?docid=-1424079446171087119...

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