In a new book: The perfect mess
2 USA professors show that a tidy and organised office reduses the amount of work done and creativity, in fact they find the more untidy and messy your office is, the higher salery you have, because you do more work and show larger creativity, this because you dont waste time in planning, organising and tidying up.
I wonder if David Allen has read this book? its directly against key parts of the GTD system. A tidy work place is number one, before you can start to look at the rest of the gtd system (David Allens book chapter4).
This is something to think about!!!!