I am new to GTD and am trying to implement it in Outlook. I have read the book, GTD and Outlook paper, and several other articles. The concern I have is that when a NA is associated with a project, the NA list does not seem to reflect this (or does it)? Thus when you complete those particular NA's, as opposed to the NA's which are single step and independent of a multitask project, you might not be immediately reminded of the project they are connected to, and that project might be left hanging until a project review is done (or maybe permenently!!).
I hope you can follow my concern and shed some light on what I might be missing. I remember David's admonission that whatever system you choose, you must thoroughly trust it and this (to me) looks like an area of weakness! Of course, I am just beginning to emply the system, so I might be missing something obvious.