My wife and I decided to check out an LBS before lunch yesterday, while we were waiting for her parents to show up. Anyway, she mentioned that she wanted to get some mirrors since she wants to be as cautious as possible when she rides. Now, i'm not a big fan of mirrors, purely because of cosmetic reasons, but she does make a good point. I much rather be safe than try to look cool. SO, how many of you use mirrors? And those that do, do you have them on your bike, or on your helmet?