As I think about this I realize that David's GTD methodology does have priorities. They appear to be as follows, using a simple ABC prioritization scheme:
Calendar (Hard Landscape) = A
Next Actions (Pre-Defined Work) = B
Ad Hoc Work = C
I have posited often that the Processing phase involves prioritization and this is the first time that anyone has taken up the topic
However, according to the Workflow Diagram, the fundamental prioritization is between commitments that are made active and those described as currently nonactionable. Next Actions could in fact be Calendar Items or ToDo's or Calls or WF.
Now, the GTD approach basically says that these priorities are negotiable.
Everything is negotiable, even Calendar items, right up to the time that the selection is made. But, I think that DA's approach is more fluid, yet at the same time more focussed, than the traditional A/B/C. It forces the elimination from consideration of those items that are not currently Doable:
-nonactionable items, including WF's
-anything other than the item assigned to the Calendar timeslot that is "now"
-items requiring location, tool or people that are not currently available
-items that will take longer or will require more mental or physical energy than are currently available at the moment of choice.
-ASAP's that are secondary to (today's) date-sensitive items
What is left to choose from is limited. The choice is positive. What is rejected is rejected for valid reasons and should not cause psychic distraction.
Andrew