I have really been enjoying these simple rubber cores that cheaply and effectively organize cords of all sorts. They make it easy to wrap a cord around due to the shape (like an apple core…duh) with slits on both ends to thread cord through. I find the hardness of the rubber just right; firm enough to hold the cord, but soft enough to be easy to bend open to insert cords.
There are three sizes: small for something like earbud cords, medium for a phone/ipod etc. charger-size cord, and large for computer charges or appliances. I haven’t tried the largest size yet, but love the ones I have. They come in a variety of bright colors which helps when it comes to finding and organizing cords.
(image via GearDiary)