Are you talking about for storing/transporting cables, or for tying them up in such a way that you can plug, unplug, move, plug, unplug, etc. all within the same room, without packing them up?
If you're talking for storing/transporting cables, here's what I do, and it works great.... say you have a 20' cord.
Fold it in half = 10 feet
fold it in half again = 5 feet
fold it in half again = 2.5 feet
wrap it into a circle and tie it "over and under" itself, as in when you're tying your shoelaces, or when you're starting a "granny knot." No need to be elaborate and wrap and wrap and wrap.... just once will do.
Works for me...
Chris