In the process of revamping a client’s filing system recently, I recommended using matching colored interior and exterior file folders to help identify different parts of her world: family, bills, home etc. (This system is described in detail by Erin Elizabeth Wells in this video.)
While color-coding a filing system is a great long-term organizational tool, it can also be expensive. This particular client already had a vast quantity of manila interior file folders, so she opted to use those instead of buying more. Then she purchased exterior hanging folders in five colors and some small colored stickers.