I must be a slow learner. I've been trying to perfect the technique of glancing over my left shoulder for on-coming traffic without drifting left, and I'm getting better, but I'm not as good as I'd like to be. So I'm thinking, maybe I should get a rear view mirror.
I know there are at least two types: handlebar and helmet (or sunglass frame-mounted). That's the full extent of my knowledge. Pretty impressive, huh.
Anyway, anyone with an opinion one way or d'other? Do they work? If so, what kind is best?