Love Barb's answer!
Here's my path, as best as I can remember:
1. Heard about the book when it first came out
2. Rushed to bookstore and bought a copy
3. Read the thing cover to cover
4. Started making lists, arranged by context, first on paper then in Palm Desktop software
5. Didn't appreciate the value of the Weekly Review, didn't quite "get" everything
6. Signed up for David's public seminar in Dallas in 2002
7. Re-read the book and thought "Aha, now I get it" (but really hadn't yet)
8. Attended David's public seminar in Dallas in 2002 and thought "Aha, now I get it" (not yet grasshopper, but I was getting much more of it)
9. Re-read the book and listened to the Getting Things Done Fast CD set (a couple of times) and this time I really, really got it.
10. Tightened up my system, began doing Weekly Reviews pretty thoroughly -- nearly weekly.
11. Others noticed my performance and asked me to speak to various groups in our office -- admin staff, summer associates; also did some one-on-one coaching with others in my firm -- "got it" even better when I had to teach it!
12. Over time went to other public seminars offered by David and davidco staff (Focus and Vision, Roadmap, etc.), including one presented by Kelly
13. Switched all my lists, etc. to Outlook with the Outlook GTD Add-In
14. By now, I consider myself to be truly on cruise control as far as GTD goes -- black belt! (But note: even black belts get a little bit out of control from time to time -- the black belt is what gets me back in control quickly.)
Note: just because I say I'm at black belt or on cruise control doesn't mean I don't come back regularly to the Connect website or forums for inspiration, etc. But I find I don't spend very much time "tweaking" my system or looking for newer, slicker software to help me. Maybe being black belt in all this is letting go of the constant search for a new and better software app or notebook that will "do" things for me and realizing that the system I've got works well for me -- I can forget about system, software, etc. and just use the tools I have to get things done.
Probably more than you asked for, eh, Kelly?
Randy