I am a big fun of a book “Battle Hymn of The Tiger Mother ” by Amy Chua. You can read my review here. Recently Chua gave an interview for Chronogram.
( source )
Amy Chua: You’re right. I think about happiness all the time. I am still trying to figure this out myself, but lately I’ve been thinking that it would be good if you could combine hard work and discipline, which I do think contributes to a strong sense of self-esteem, and apply this to a much wider and more experimental out-of-the-box kind of choices. (…)
The thing is that I still believe you should put 110 percent into everything, whatever it is you choose.