Revising thoughts

Anyone know of any good sources of commentary on adapting books to film? I'm looking at my last five chapters and trying to take the basic story I know and deepen it, adapt it, so that, as Holly Lisle would say, it has all of the passion and none of the toothbrushing. I imagine it's a bit like making a film, where you have to somehow make what you show the most moving and key points. Sometimes that means rearranging things or making a new, more saturated scene to take the place of a so-so one. I've found stray comments occasionally by filmmakers on this very thing, and I guess I'm trying to put my mind around that and see my book the way it needs to be seen. Ideas?