Happiness: Sometimes we are not very good at figuring out what we really want; or, our perceptions of what will make us happy or unhappy are unreliable. Implications? Think economics. An old article by James Surowiecki in the New Yorker
Expertise: A review of Cambridge Handbook of Expertise and Expert Performance (Cambridge University Press, 2006). Bottomline: Genius (interpreted here as experts or expert performers) are made, not born.