Just a thought...
I'm very well educated in traditional, structured Project Management techniques.  All that being said, I'm not sure that GTD isn't on to something:
- come up with a vision - it might be completely unrealistic
	- if you do enough things, eventually you'll get to a good enough place.
It's a kind of naturalistic approach to Project Management.  I'm not sure it isn't worth more thought.  Many a project has exceuted perfectly using structured PM techniques and been a complete failure (and vice versa).