Getting Things Done with the Natural Planning Model

I like things that demonstrate good common sense!  One of the things that has made me glad I chose this book to read is that, in addition to having practical application, it uses common sense!  Allen's system of organization is not complicated and does not even involve a lot of high-tech devices.  Much to my delight, he simplifies the process of organization so that anybody can become more organized using his suggestions.  A perfect example is  the filing system he recommends-a simple A-Z filing system for reference materials.  I have been surprised that just as easily as he recommends devices for keeping notes, he is just as quick to suggest simply writing things down on paper.  I think that probably would make this a very user-friendly system to some who might shy away from technology.
The prominent idea in the pages I am currently reading is the "Natural Planning Model."  This process of project planning involves five steps: 
1.  Defining purpose and principles
2. Outcome visioning
3. Brainstorming
4. Organizing
5. Identifying next actions

Allen says defining the purpose of a project can be done by simply asking the question "why?"
He calls this using advanced common sense!  Next comes envisioning the outcome,  followed by brainstorming to see what activites might lead to the desired outcome. Finally, putting these steps in order, followed by identifying what is to be done next.  Allen uses the term "unnatural project planning" to describe the process that begins anywhere but with the purpose of the project.