Wear bright shirts or bright shirts with reflective material. Dark colors disappear after dark. A lighter color shirt will give the motorist more to gauge distances with. Reflective tape on your bike seems to really stand out and make it more obvious you are on a bike. I also adhere to the 2+ lights front and rear philosophy if only incase one should fail. I've lost light from thier brackets on rough roads, had lights fail in rain and forgotten to replace the batteries until it was too late, so I always perfer a backup.
Craig