Every now and again a simple but effective product comes along that makes you ask "why didn't I think of that!?". The Sinch headphone assistant (US$15.99) is one such product. It's a simple yet stylish solution that aims to untangle headphone cords. It uses a combination of an elastic band and magnets to keep your headphone cord organised and attached to your device without tangles. Simply plug your headphones into it, pull out as much cord as you need, then snap it closed.