I'm also thinking about re-reading Geoffrey Moore's "Crossing the Chasm" http://www.amazon.com/exec/obidos/ASIN/0060517123/prokhorenkous-20 and reading William Davidow's "Marketing High Technology" http://www.amazon.com/exec/obidos/ASIN/002907990X/prokhorenkous-20 I'm a little bit worried about last one being dated 1986 though. ;)
I really excited about how I'm shaping my professional life right now. Four years ago I was so much into software development and Unix internals with only a portion of business side, and after those years, I feel that I extended my skills significantly. More to go and sky is the limit. :)