Maybe you do this already, but the best thing I ever did to keep the paper mountain under control is to buy 2 Sterilite drawers and stack them. I bought the 12x12 size so I can fit in a little more like books or construction paper. I labeled one drawer for each day and the extra says next week. I also *try* to have copies done a week ahead so I never have to wait in line for the copier or get caught if it is down.
Simple but effective! I'd love to hear your best organizing tips!