My Dollar Store regularly sells Velcro cable zips, offering between five and ten for a dollar. Sometimes they're black (as shown here), other times they're rainbow colored.
The Dollar Store version was my gateway drug. When I discovered I could buy the same zips in bulk over at Amazon (100 ties for US$9.83), I immediately pulled out my credit card and bought a bag. It's not that I saved all that much compared to the Dollar Store price, it's just that these ties are insanely useful.
The hole at the top of each tie is critical. It allows you to thread the tie onto a cable, where it stays until you're ready to wind it up. I now have these attached to my millions of Apple USB cables that during a regular day get attach