There are times when I go, “Why didn’t I think of that?” and this is one of them. If you use earbuds to listen to music and you are forever getting the cable twisted, knotted or generally in a mess, then have a look at BudTrap. It’s a little doughnut-shaped rubber ring that fits over the 3.5mm jack and then grips the cable to stop it unwinding. Just look at the pictures and you’ll understand. Although they generally show iPods, I think the BudTraps work with most devices and earbuds.
The BudTraps come in a great range of colours and prices start from $5.95, with reasonably priced world-wide shipping from Sydney, Australia. I’ve ordered a pair.