There's not much that can be done to make a USB cable special. Because you get them with almost every peripheral even the casual computer user likely has a spare or two, but it's worth investing in some Delphi USB 2.0 Lighted Cables for a variety of reasons.
If you are someone who uses 3 or 4 peripherals, you could probably use some color coding to make things easier to identify. Even if you don't connect every device with a lighted cable, the contrast provided by just having one or two devices lighted can make things easier to identify. Because the lights themselves are powered by the USB power coming through the wire, if it is not connected then there will be no light, so it's also an easy way to tell if something is connected or not.
The cables are 10 feet long (longer than most free cables you get with peripherals), and the standard USB A to USB B connection (male & female ends, same size).. A warning though: these cables are really bright. They will light up a room like a christmas tree, and this is not hyperbole. If this will bother you, seek a different solution.
As ubiquitous as USB cables are, it's worth spending a couple of bucks (literally) on Delphi USB 2.0 Lighted Cables to make it easier to navigate big balls of cable and see immediately what's hooked up and where.