Books that helped me learn the craft of writing:

Stein on Writing by Sol Stein
Steal Like an Artist by Austin Kleon
Second Sight by Cheryl Klein
What If by Anne Bernays and Pamela Painter
Twenty Master Plots (And how to build them) by Ronald B. Tobias
The Emotion Thesaurus by Angela Ackerman and Becca Puglisi
Self-Editing for Fiction Writers (How to edit yourself into print) by Renn Browne and Dave King
The Writer’s Little Helper by James V. Smith, Jr.
Pick up as many editions of The Writer’s Market as you can. Each year has great tips.

Helpful websites:

www.sweeneywritingcoach.com - I have taken several of Joyce Sweeney’s writing classes, both in person and online, and can say they are excellent for learning craft.
http://www.scbwi.org - The Society for Children’s Book Writers and Illustrators.