Portable mouse. Got one from Staples for $19.95. If you dislike wires as much as I do then I'm pretty sure you already have one of these wireless mouse. I had a one by Microsoft before but they don't last last. They start acting funny after a year or so. But logictech wireless mouse seems to be ergonomical and last longer and work better.
And if your a graphic artist like me and can't work without one, ofcourse if you gotta have one of these.