One of the times we went back to The Container Store to fine tune the closet organization, I saw these little "Cable Drop Cord Clips" and thought it might be the perfect thing to hold our laptop power supply cords when we convert the office into our dining room. Often when we return to work we end up having to fish the cords from the floor.
They're perfect. They stick on, are totally unobtrusive, come in a variety of colors in packs of six, and they work!