There are very few things in life that get right under my skin, triping over cables is one of them. I think I may have seen a product like this somewhere - not sure, inspriation being the mother of invention and these are fairly easy to make.
Step 1: Parts
With the cut-offs left over from the laptop case project I cut out little bone shapes. The mat is 1/8", after a little testing I found that the bones had to be a little stiffer. I glued two together. They dont have to match up perfectly.
Step 2: Drill a hole to secure the cable
Drill and cut in from the end.
One little caveat is that when you wind the cable on you need one end free or you'll wind in a load of twists to the cable, but once its done its stellar at keeping those pesky cables out from under my feet.