Just read through GTD after having implemented some suggestions based on the system over the past few months. While I like the theory I am having some difficulty in implementing.

By biggest stumbling block seems to be how to consolidate stuff. I am referring to the mass of things I need in all aspects (reference, next actions, projects) which comes in many forms, emails, printed bills/receipts/etc, manuals and other physical reference materials, computer files. Furthermore, all of these materials can be in any one of several locations at once, work, car, home, etc. I've already started scanning many reference materials, but I cannot do this for all (manuals for example), so it seems to me like one location will not work for all items, but will two or three locations work? To further complicate things, I suspect I would have the same organizational folders both in My Documents on the computer, in Email, and then in physical storage.