I never set out to become 'famous.' I mean when you're 14 you think 'I'm gonna become a writer and people will want my autograph and that'll be cool ' but you grow up and you learn that's just not how the world works. I resigned myself to the fact that I would probably never be published and if I did it probably wouldn't be a big deal.
Love. Fall in love and stay in love. Write only what you love and love what you write. The key word is love. You have to get up in the morning and write something you love something to live for.