I've been doing some GTD on and off, and to me the whole point is pick and choose. The 43 folders is one idea that I thought of as a good one, but not suitable for me.
I wonder if the 43 folders might work in an e-mail form though for putting e-mails off to a later date and then review them.
One of the points David Allen makes in his book that I didn't 'get' first time round was : "It's important to get reminders of everything big and small recorded in a system outside your head not because everything is equally important but because everything isn't."
And it has to be a system that you trust or you won't be able to let go of those mental reminders. Trust means not just that it won't get lost but that you know that you'll review it regularly enough to deal with the items.
I wonder if the 43 folders might work in an e-mail form though for putting e-mails off to a later date and then review them.