I have many varied interests, and most require some amount of free work space on my desk. I do not always finish what I've started in one sitting, or one day, or even one week. In the mean time, the space occupied by whatever current project often needs to be cleared for something else. It got to be a drag to have relocate numerous tools, wires, bits of this and that, especially if I had something in a precarious stage of assembly. I can't afford to have a different desk for every project, so I've settled on the next best thing: different self-contained work areas. It's a crazy simple but super effective solution.