First, find out what your hero wants, then just follow him.

Ray Bradbury (1920-2012) American writer, futurist, fabulist

Lecture (1973-06-22), Santa Barbara Writers Conference, Cate School, Carpenteria, California
    (Source)

Quoted in Barnaby Conrad, The Complete Guide to Writing Fiction, ch. 13 "Motivation" (1990). Conrad was one of the founders of the SBWC.