Assorted reflective bits, including sidewalls, and Bell Radian lights for "be seen." At the moment, I have a 200lm LED flashlight in a universal handlebar mount to see, plus a helmet mounted 100lm led light. Magicshine and Radbot 1000 on their way via UPS.
The yellow on the stem and seatpost are Giant reflector wristbands that I use as pants stays when I'm riding in regular pants.
GoPro on the helmet most of the time, as well.