Allaway1 said:
So my physical filing system will have two folders!
Now that I understand the "in box" can be a metaphor and not just a physical thing, it's starting to make more sense.
I'm surprised at your lack of paper and would question whether you are being complete in your assessment. I have things like social security and medicare information, passports, insurance certificates, motor vehicle ownership documents, birth and marriage certificates, documents regarding investments with original signatures, federal inspection certificates for the sheep flock with original signatures that I have to keep, by law, for 7 years, sheep sales records, medical testing results for federal monitored sheep diseases that are certified with embossed seals, sheep registration papers with embossed seals that must be surrendered when the sheep are sold, manuals for equipment and hardware that are not available on the Internet, genealogical data and some original documents related to family history, photos, slides, books, magazines, some reference and some just for reading, paper bills for companies that do not provide on-line options, articles of incorporation with original signatures and embossed state seals, official finding regarding water rights, water share ownership certificates, deeds to real estate, lease agreements with signatures and more. Even if you are not managing those files yourself, someone is and you may need to interact with them. So it behooves you to understand where they are, how they are filed and what actions might be required regarding them.
I'd be a lot more expansive in your search for materials that need to be included in your GTD system.
As for inboxes, I have a physical paper one, I also have an e-mail inbox that collects messages from 12 different e-mail accounts that I must monitor. Then there are inboxes like my list manager inbox for direct digital inputs, Ravelry, Twitter, Facebook business pages and forums like here.
I'd strongly suggest you finish the GTD bvook, and then go read Making it All Work and Ready For Anything as all 3 expound on the GTD concepts and I think you get more out of the entire program if you look at all aspects.
Also don't think that GTD is only for your work life. Is equally if not more relevant to personal life situations.