All very good advice. I am continually amazed by cyclists I see riding in the dark or near-dark wearing dark clothing and no lights or a small, dim blinky in the back.

I always wear brightly colored jerseys, vests or jackets when riding in the dark. By bright, I mean neon green or with lots of yellow. I use 2 headlights and 3 tail-lights for added visibility and redundancy because I've had batteries go dead on many occasions. I also use a reflective ankle band and have reflective sidewalls on one my bikes that I use for commuting.