Implementing GTD: careful planning vs leap straight in and tweak later
I am intending to implement GTD in the extremely near future, and have been giving a lot of thought to exactly how I'm going to do it. After reading the book and browsing through some of the posts on these forums, it strikes me that there are infinite variations on the basic system, and I need to figure out which variations are going to work for me.
So my question is this: should I spend a lot of time now meticulously planning everything and using my best efforts to get everything right from the start, or would I be better off just planning things out roughly and then tweaking things as a go along once I get a bit more experience with the system?
I'm leaning towards the latter approach, but any thoughts on how much advance planning is appropriate would be very welcome.