As best I recall
1. Bought book in bookstore (I think soon after it came out)
2. Read a little more than half of it - at that time I read it as a source of organizing inspiration but honestly it never even occurred to me to implement the whole thing. I was more of a "yeah that is a good idea" or "no, that sounds like a lot of trouble." In many cases I skipped sections (such as natural planning model) just on the basis of "I hate planning models" without really spending the time to see what it was. I know I never finished the original copy because I found it when I moved recently with a bookmark in it!
3. Absorbed more information re GTD from osmosis and internet blogs over a many year period, had good feelings about GTD, did some GTD-ish things but had not spent the time to really implement it other than bits and pieces.
4. Workload/responsibility increased, started getting harder to control.
5. Bought a book/CD set, listened to the CD, and read the whole book.
6. Started using MLO software. Used it in a spectacularly unsuccessful manner for a few years. I remember the first day when I wrote down my initial list of next actions - I had 600 for work, more than that for home, and I never finished home. I did have some multiple sequential actions (maybe that explains half of the items) but also I have trouble telling myself I can't do something if it seems like a good idea!
However, it is very dampening to the spirits to try to handle a list containing more than 1500 to dos!
7. Started on a downward spiral into overwhelm paralysis.
8. Reorganization and greatly increased turnover (requiring lots of mentoring) significantly increased my workload again. In addition had some highly stressful personal events around this time.
9. Realized I was in PAIN and had to do something......Purchased more GTD materials on CD, started listening to them every day on commute.
10. Joined Connect and started to saturate my brain with GTD, listened to everything, some of it twice.
11. Set up system in Outlook with the add-in.
12. Bought an iPod.
13. Did some weekly reviews even though my system wasn't all that clean.
14. Created some on deck/incubate/someday maybe categories and reduced current list to ~ 350.
15. Bought MindManager and actually planned some things I would not normally plan.
16. As I stick around I keep realizing things I'm doing wrong (or things I can do more right.)
17.........to be continued, this is definitely a journey for me.......