I took a flight on American Airlines this week, and there is a great article on Getting Things Done (GTD) in their in-flight magazine, American Way. Pick up a copy on your next flight or check it out online.
You'll find first-hand testimonials from some great GTD mentors like Mark Orchant (aka "ark Orchant" in the online version) and Michael Hyatt. This article is also a great way to give your unindoctrinated friends a great intro to GTD.