Shower mirror. It has a base that suctions to the wall and a reservoir that you fill with hot water so that it doesn't fog. I had no idea how much better it was than shaving at the sink. If I'm in a hurry I'll sink shave but I love shower shaving and I love that mirror.
Edit: Here's the one I use. No major complaints, just remove the mirror between uses and re-suction every once in a while.