I do non-fiction writing -- and I don't do it enough.. It's kind of depressing me. I mean, over the course of a month I'll turn out pages and pages of notes, and then when I distill it, when I make it into something coherent, I'm left with 2 or 3 thousand words.. It's depressing. All the effort and little results! Any advice on how to write more -- and how to write more well?