GTD

Any of you use the GTD methodology? I'm reading David Allen's new book. I'm a white belt at best (to use his frequent analogy), but I'm hoping to gain a few belts in 2009. Such a great system. Just needs to be worked. I love to just jump into things and do it without taking time to plan my days, thus sabotaging my use of GTD and not GTD as well as I could.