My inbox zero method

I've noticed that it takes my colleagues ages to find a specific email, because they leave absolutely everything in the inbox, treating it as a giant unsorted archive and to-do list. My method is to leave nothing in the inbox (for longer than it takes for me to pop it in another folder). I have 3 main folders: To do: emails that require me to do something. FYI: emails that don't require me to do…