CKH said:
1) CAPTURE everything, as a previous poster suggested. Once everything has been CAPTURED, continue to
2) PROCESS. Decide what the NA would be...
Yes, I think that there is a natural progression to the 5 phases and that they can be thought of as a incremental training model (stages of development) as well as a breakdown of the entire GTD methodology. At least, it seemed to work that way for me.
While there's no getting around the fact that you have to do all 5 at once as best as you can (otherwise *nothing* would get done) what I focused on initially was ingraining the habit of collecting *everything*. When I thought I had an airtight collection system, I moved on and focused on the processing phase, and so on.
As a benchmark of my progress at any stage, I do an intuitive gut check. How confident am I in my abilities right now? How leak-proof is the phase I'm working on? More importantly, how much attention am I putting into this phase? Do I have to think about it constantly or is it just happening automatically?
Don't get discouraged too quickly... while the 5 phases of workflow are instinctive (we all must do them to some degree in order to get anything done), reaching the point where you do them consistently and completely for all the STUFF in your life is not easy. I see it as more of an ongoing process and something that I will probably always be able to improve upon.
For example, while I feel pretty good about my collecting, processing and organizing abilities, I know for sure that both 'review' and 'do' could use some work (and I've been doing GTD pretty seriously for about a year now). One of the benefits of sticking with the process though, is the corresponding sense of peace, focus and control that you gain as you master each phase.
It does take a little bit of monitoring and self-honesty though. After all, it could be 'off your mind' just because you're not doing/thinking about it at all! Periodically, if I feel an area is getting a little sloppy I will make a conscious effort to confirm it's integrity and then go back to auto-pilot as far as that phase is concerned.
One of the remarkable things about GTD is that the 5 phase model is not just a description but that it's also a tool that can be used to perform these sorts of habit changing functions and benchmarking checks.