I have a piece in the New York Times Book Review where I ask writers to offer pithy advice about writing:

I suspect writers are more likely than, say, firefighters or doctors or second basemen to seek professional advice from those they admire. This is because writing is regarded as a magical act, its mysteries parted, if only temporarily, by the adoption of some practical rules about point of view or the use of revealing details. The truth, of course, is that writing is a wholly individual, idiosyncratic practice. When I started asking writers I knew or met at literary festivals to sign their books with a piece of valuable advice, I began to see it not as self-help but, instead, as a glimpse into that particular writer’s mind.