Some other books that I can recommend:
The Artist's Way, by Julia Cameron - more of a holistic overview of getting your 'flow' happening.
The Writing Book, by Kate Grenville - I rate this up there with Elements of Style as a good way of addressing the fundamental needs of writing.
Also, Stephen King's
On Writing is OK. I can't be more enthusiastic in recommending this because King seems to take a "MY WAY DAMNIT" approach to writing, where it's pretty clear that there are approximately 6.5 billion ways to go about telling stories, and the best thing to do is to experiment until you find what works for you.