If I had to pick one report, video, or product I received for free, or for my e-mail address, that had an impact on my thinking or marketing, it would have to be the Million Dollar Napkin video that Ryan Deiss did for the The Continuity Blueprint launch.
Million Dollar Napkin
So, I was wondering what the best "free" exchange has been since you joined this wonderful community?
And please don't say the Warrior Forum because we all know that it is great. :p