Two of my favorites are The Writers Journey, by Christopher Vogler, and Bird By Bird by Annie Lamott. Have a working knowledge of what they teach. That's how you get published. Get critique from other writers. All of these are invaluable in helping the writer get a good firm handle on the craft of writing, as well as what is going on in the industry.
Writing is a wonderful, difficult, and rewarding experience.
But nobody ever said it was easy. Go forth and write. The world is waiting.