Do you have something that you never leave home without? I do. It is my wallet-sized magnifier with a built in light. It is convenient for those times when my reading glasses are not readily available, or I'm trying to read directions in the dark. I found it to be a lifesaver this past year while in Rome. The font sizes on the city's maps were so small they were impossible to read, and even more impossible in the dark. With my handy-dandy magnifier, reading my map was a snap!