On: Roads with protected bike lanes make both cycling and driving safer: study

[Johnny555]

I tried some helmet mounted mirrors, but they moved around too much for me, so I switched to this eyeglass frame mounted mirror:

http://travellingtwo.com/resources/take-a-look-mirror

It's simple to clip on, and stays put once it is, I've been using this mirror for over 5 years and feel uncomfortable riding without it.