While visiting Facebook, I was perusing some posts in The Model Rocketry Fanatics Group when I came across a familiar topic. X-acto knives rolling off the work surface and falling, typically into your foot.

or breaking the blade point off (which you never find til walking around in your bare feet some time late at night)
The reason I say familiar is because many years ago I wrote a short article about the first suggestion below for Apogee's Peak of Flight Ezine.