Being a person who loves having things organized, I hate having a mess of cords (laptop, phone, iPod, etc.) on my desk while I work. Something I really like about the Macbook charger is the small clip that's attached to the cord. Not essential, but definitely handy. That's what inspired me.
Previously I had tried organizing cords with blu tack, but that became messy and a pain to scrape off.
Then I had the idea of making clips. I could make them out of Sugru (only I had none) or out of any carve-able plastic. Eventually I used Sculpey. Even though Sculpey becomes pretty hard after you bake it, it works really well as a cord holder. At first I thought it should be a flexible material, but the Sculpey proved that hard material works fine.

Supplies:

Sculpey (any color)
Double sided tape
Knife or razor blade
Scissors
Cord

Step 1: Modelling

Using Sculpey to make this proved to be much easier than I had expected. To make a holder, get a small cube of Sculpey about 1-2cm ³. Then take your cord and press it into the block of Sculpey to create the shape. Gently squeeze together the top of the holder so that the cable will get locked inside and not slide out. To make it look nice (doesn't really add to the functionality), use a knife or razor blade to cut off the sloped sides.
Before you put the holders in the oven to harden, double-check that the cord fits tightly, and doesn't slide out too easily.
Then let them harden in the oven for 30 minutes, 110°C.

Step 2: Make It Stick

The tape on the bottom of the holders allows you to stick them anywhere, so the cords stay out of the way. They could even be stuck along a wall or up the side of a desk, but I didn't need them for that.
To add the tape simply stick the holder onto a strip of double-sided tape and cut it off at the side (make sure the surface of the Sculpey is clean first). Then pull off the foil to attach it anywhere, to anything.

Step 3: Done!

That's all! If you also had a mess of cords, I hope this helped you clean it up.
Don't forget to subscribe and post a photo of your own Sculpey cord holders below.