The other piece is way down at the other end of the table by my ironing mat. Nothing really significant about the placement except that they are 36 inches apart. Sometimes when I have several yards of fabric that I have purchased for backing or background fabric, I want to do a quick estimate of the amount I have. So I stuck the tape on the front of the table to quickly measure yards of fabric.
I don't know if this will work for everyone, as you need a table or surface that is at least 36" long and you have to be willing to put tape or some other mark on it. But I can tell you it saves me quite a bit of time hunting down a yard stick and finding a place to measure large pieces of fabric.
Stop by Lea Anne's Pondunk Pretties to see some other useful tips.