My inbox is every email conversation that isn't archived. It is a list of items awaiting action from me. (Just because an email has been read doesn't mean it do

My inbox is every email conversation that isn't archived. It is a list of items awaiting action from me. (Just because an email has been read doesn't mean it doesn't require action from me.) If it no longer requires action from me, then I archive it. Thus the inbox is a portion of my global "to do" list and represents, in a very real way, the amount of Stuff that I need to worry about at any given time. I had no idea that "do all of the Stuff that you need to do" had such a fancy name, or was worth writing a book around. Aiming for zero is fine. Expecting to achieve it is impractical, of course. We all have Stuff to do.