I've battled the same addiction! I think my two favorites would have to be Immediate Fiction by Jerry Cleaver, and Techniques of the Selling Writer by Dwight Swain.
I read On Writing by Stephen King, but to me it was more of a rant against poor writing than a helpful guide. He took the adverb thing way too far, imo. Now, aspiring writers are afraid of them!

Its saving grace was the personal account of his accident at the end. His anger over the accident (and his inability to punish the driver) explained why the front of the book was the way it was.