1. Scene & Structure by Jack Bickham

2. Writing and Selling Your Novel by Jack Bickham (only thing that doesn't work for me is the self-concept theory--it's just threats; the self-concept thing is mumbo jumbo, as mumbo jumbo to me as Campbell's hero's journey)

3. Techniques of the Selling Writer by Dwight V. Swain (best book on writing I've ever read)

Great techniques that have helped me really juice up some scenes and fix a big plot problem. Even down to the blow by blow writing level.

I also picked up Writing Fiction for Dummies by Ingermanson. He had some interesting insights to add. In fact, he had one that I think is the best way to think about acts. Which is to forget "acts" altogether and think about what's really happening in the story. He calls it hook and 3 disasters and a resolution. I HATE "acts." They've never made any sense to me at all. Never. But talk to me about threat and problem and story is a whiz. Really is productive for me. And I liked how Ingermanson put it.

Got a few interesting insights from Scott Bell's Plot & Structure, but the 4 above were most helpful.