I double the cables over until they're short enough, and then tie them into a loose half knot.

No fasteners to wish for, or to fail.

Both ends of every cable are always next to each other for identification at a glance.

Different cables cannot tangle with each other in a box.

There are no axial twists imparted into the cable.

(Stage hands hate this technique, but this isn't stagecraft.)

another benefit of the hair tie method is when you go to use the cable, you can take as much length as you need from either end, then bunch/coil 'n wrap the rest with the hair tie. You have given me a lot to think about though, I'm always looking for ways to improve my cable storage techniques