OP,
I made this a while back in order to respond to questions such as yours:
http://forumserver.twoplustwo.com/sh...page=&vc=1
My suggestion would be to thoroughly go through that (including reading/listening to all the references).
If that doesn't do it for you then I'm pretty sure that it's not far away in the abstract ideas of the state that you should looking into but things much closer to home. (check out this to follow up on that:
http://www.youtube.com/watch?v=VCAT4oob9hs )
Good luck!