I was struggling to get an accurate measurement of the distance under my sink up against the cabinets, and couldn't fit my tape measure in there.
To make something to transfer the measurement to the piece I was cutting, I wound up taking two sections of All-Thread, firmly zip tying them to each other. Then I could jam the setup into the area, and simply rotate one section of all thread one direction to make it longer, the other to make it shorter. Once it was fit up just right, I pulled it down, and transferred that length to the piece I was cutting.
If you're not a savage, you can even cut the tails off the zip ties.
Hopefully this can help someone else out of a tight spot!