In my last CCM, a lot of people asked me about my bicycles lights. My view is the more visible I am, the less excuse that someone has for hitting me.

Here is a list of the stuff people were asking about:
 

Integrated Mirrors, turn signals, and running lights
http://www.winkku.com/

Actual Brake lights
https://www.youtube.com/watch?v=n707mCp3Qfk
http://www.amazon.com/WIRELESS-Brake-Light-suitable-bicycles/dp/B00...

Lights for pedals. (No batteries needed)
http://www.pedalite.com/more_about_pedalites.aspx

Reflective tape (Bright light reflection)
http://www.amazon.com/Duck-00-07892-Reflective-Tape/dp/B0038G4L7Q/r...

Reflective tape (Bright light reflection)
http://www.amazon.com/Duck-00-07892-Reflective-Tape/dp/B0038G4L7Q/r...