Someday soon(ish), virtually all of your electronics will transfer data and maybe even charge wirelessly, but in the meantime, we're stuck managing cords and cables. You'll find about as many cable management solutions as there are stars in the sky, but I've never posted my favourite simple cord-wrapping and shortening technique. So here goes.
The technique, as you can see demonstrated in the video above, is very simple. You start off tying a loose overhand knot, then just keep wrapping the loose ends of the cord around the knot. It couldn't be easier, but it works like a charm. I use this all the time. Go forth and organise!