Here's how to make a really effective cord organizer. I wanted to buy something like this but could not find it...
From the picture, you can probably figure it all out. But I'll give you the step by step and some things that I learned along the way.
I initially was using it to hold multiple sets of earubds. But it can just as easily handle a wide range of various cords/cables. Common uses that I would see:
Cell Phone Power Cords
Other Power Cords