Yes, I read "Getting Things Done": he teaches you to make todo lists! That's it, nothing profound or from another planet. Basically you could get that information in 1 paragraph: "if you're overwhelmed, make a todo list", but he wouldn't have made a lot of money that way...
That's quite a reductionist view of Getting Things Done. There's nothing magic about the system, but someone had to put it together. It has been useful to me.
There is more than that, though. Deadlines, Next Tasks, Weekly list purge/build, Yearly alignment etc etc.
Also how you teach somebody a thing matters.
Stories have a profound effect on humans since the earliest of our days.