I know the title's lame. And it's part of a how-to-write series. I don't care. James Scott Bell has written one of the best books for aspiring writers that's out there.
Even though you think you're getting just tips on plot and structure, you're getting so much more. He gives great characterization tips. He gives great "writing life" tips. He gives great storytelling tips. He talks about genres, dialogue, and tension.
Seriously. I would marry this guy if he were single. Well, and if I were single.