MacGyver
The copier at work broke down. It was jamming, a lot. Always in the same place. I opened it up, inspected things, and discovered two problems. A horizontal bar was missing a pin the held in place, and probably because of that, another plastic piece, designed to hold a spring, broke. Without the string in place, paper guides were no longer held out of the way of the paper, causing the jams. Using a rubber band, I was able to temporarily replace the need for the spring, and the copier worked well enough until the repair guy came. He didn't have the parts we needed, so he further MacGyuvered it with a soldering iron - creating a temporary notch to which he could attach the spring. It doesn't work any better than my rubber band trick, but it made him feel better.