I use masking tape a lot to label stuff, tack stuff in place mark a spot when measuring. And of course for masking.
I was tuning up a pair of scicssors and had to tweak the bend in one of the blades slightly. I have jaw protectors for my bench vise, but needed something to hold the other side without marring the metal. So, I made jaw protectors for some slip joint pliers out of a thick sheet of brass left over from an earlier project.
I have been working with Sandi Kirby on a table-top training kit for rowing umpires. We came up with a mat that represents a race course, and a set of boats, course markers and other kit that can be moved around the course to facilitate the discussion of various training scenarios.
We are releasing the design into the public domain so others can make their own. Your local sign shop should be able to print the mat, and a laser cutting service like Ponoko could cut the parts for you.
If you are going to make one of these, drop us a note in the comments, it would be neat to hear if someone finds this useful.