If I'm going to finish a small piece with mineral oil, I'll also sand with it - acts as a lubricant and doesn't generate any dust. I'm sure pretty much everyone knows that. My problem is that I've knocked my cup of oil onto the shop floor several times. Glenn Lucas posted a tip on his site - dropping a small magnet into the cup so it stays on the bed. I think I have a small improvement: I now use 4" magnetic parts holders, like this one at Harbor Freight. I also use them in our classroom - no more spills!