I look over my shoulder. Tried a mirror that attached to the bar end on my drops and it gave me a nice view of my leg and couldn't go out any wider, tried a helmet mirror and I found that it either gave me a view of my pack or that I ended up trying to turn my head to see where the car was and just got frustrated as I couldn't really tell what was coming from where. Now I just look over my shoulder and it seems to work better for me.