1. For headphones I cut a 3 inch length of velcro. For bigger/longer cables and wires just increase this length, e.g 6 inches for laptop cable.
2. Pull apart and refix with up to an inch of overhang at either end. You can adjust this once you've tried it out if it needs to be longer or shorter.
3. Wrap and fix around annoying and disobedient wire.
4. That's it. Done! Neat, tidy, quick and super cheap. Now sit back and feel smug about the task you've just completed!