I'm frustrated that the #2 link on Hacker News right now is a rambling rehash of How To Win Friends and Influence People, the first book listed here: http://ycombinator.com/lib.html
I want to read it, so far I've just used the audio book and enjoyed it, but didn't really focus on it as much as I would have if I had read it.
I forget who said this but it's true: "The secret to success is no secret."