I'm not far into this book (Chapter 4), but so far I find it very illuminating. I don't have a lot of project management experience; I'm used to working alone or an small teams, and I don't have an engineering background (lit grad turned programmer). I've got a lot of goals and big ideas for several projects, and this is really giving me a handle on how to approach them, what kind of information to present to people, how to ask good questions, prepare documents.

Just got through the "vision" chapter, so now I'm going over all my active and pending projects and trying to hammer out good vision statements. Next up: "Where Ideas Come From." Berkun's writing is lucid and engaging; a very easy read.