One One Hand ...
My first exposure to David Allen was in 1990 during a seminar at my company. What immediately clicked for me was the next action and outcome connection and putting those things on different lists.
I had success right away with my Time File paper binder written with pencil and marked off with a highlighter.
This morning I got my inboxes to zero, made processing decisions and organized the results into my OmniFocus-based system on my iPad. I've got a pretty reliable system but I feel like I'm still learning GTD.
GTD feels a lot like learning something like the game of golf or playing a musical instrument. You make progress but probably never master, or at least never stop improving.
How did you capture that thought?