I've been reading at Seeing the Blue Between: Advice and Inspiration for Young Poets compiled by Paul B. Janeczko. Lots of gems here, but I found myself especially loving two bits of advice to a young poet from J. Patrick Lewis.
"Book your eyes on a never-ending cruise: become a lifelong reader."
And "Nothing succeeds like failure. Revel in it. You may take a measure of pride if you can say, 'I failed three times today, and that was before lunch.'"