SOLAS marine reflective tape on mudguards and panniers. This is seriously good and relatively inexpensive stuff. Reflective strips velcroed around each ankle. Flashing reflective armband. Reflective Sam Brown belt. Very expensive mtb front light used at one of its lower settings (full power would dazzle oncoming drivers if used on-road). Six LED cateye rear light, 3 steady, 3 blinking. If you saw me at night you'd think you were being ridden down by a Christmas tree, I'm conspicuous.