No.1: The appreciation of a good bit of string.
I had to measure the dog's chest for a harness today and I discovered a nice length of white nylon cord attached, as a drawstring/handle affair, to a plastic carrying thing. After un-threadelling it and using it to measure said dog I now have a lovely length of gleaming white cord, neatly looped, on my desk where it will stay until I place it lovingly into a tool drawer.
Si