Horizontal versus vertical! How many “stacks” do you have in your house/office/craft room/work space? Vertical stacks do NOT work! Why? Because you have to dig through them to remember what’s on the bottom! Instead, make them horizontal. Incoming papers that need to attention but not ready to file? Use a desk top file holder with a folder for each topic. Use that for your rough sort that you rid yourself of that pile! It’s easier to work when you sit down to a clean desk!