I think my favorite tool, and something I couldn't work without, is my magnifier/light. I was lucky enough to be out shopping with my DH, when we came upon this device in a fabric store (don't remember why we were there - the extent of my sewing is replacing buttons and sewing hems.) I said, "Wow, I could use something like that." And DH said, "You need it - let's get it."
The magnifier was something I wouldn't have picked up if I was out by myself. It's been a real blessing! Working with beads can be hard on the eyes. I also use it to read the telephone book and dictionary. I would highly recommend something like it to anyone doing “close” work or needing to read the "fine print!"