I recently took a stab at innovating a basic workplace tool, a paperclip, using 3D printing. The new paperclip is called the 123 Priority Paperclip. I took a paperclip design licensed under the Creative Commons agreement and extended the design by adding the number 1, 2 or 3 to the top of the paperclip. The purpose of the new paperclip was to let a person give a stack of papers a priority simply by attaching a numbered paperclip to it.
There’s many things that can be upgraded using the method of taking existing items and extending them. You can try it easily too by using the online 3D design site TinkerCAD and uploading your designs to MakerShop.co.