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 c...
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.