Prior to 2001, I used the Franklin Covey (FC) time management methods for years. I started with a paper-based implementation, but began blending in the use of a PDA in about 1999. I studied Covey’s books and went to a couple of his seminars, and was pleased with the life-management improvements I was able to make using his system. Then, in February 2001, I read David Allen’s Getting Things Done (GTD) book and immediately began implementing GTD on my PDA. I liked it because it was a fresh approach and I had gotten a bit stale in my implementation of the FC approach.
The full article is HERE. Great link.