Here's E. L. Doctorow talking entertainingly about writing (introduced by George Plimpton, 2000, length is about 12 minutes).
He reveals how perfectionism made a note to his children's teacher one of his hardest tasks...
He also talks about writing in two voices in his novel "World's Fair" and how long it takes to write a novel and the reassuring fact that for the first few months of writing a novel "you don't know what's happening."
I can also relate to his feeling that it may be best to avoid experience...
I can't embed the interview but here's the link:
http://www.theparisreview.org/audio/5258/the-art-of-fiction-no-94-e-l-doctorow