So I have a question about what should go in a GTD filing cabinet. I've heard that everything should be organized A-Z. But I need a tickler file, incubate file, waiting for file, next action file(s) and project files. I'm not sure how to organize them by A-Z and through the more functional system. In fact, I'm pretty sure it's impossible. I have a cabinet lined up, ready for purchase, but I didn't want to buy without knowing how I would organize folders within the cabinet.