Wear a hi-vis jersey, shirt, jacket or vest, or make your backpack hi-vis. Reflective tape on any of these is a great idea. It is usually more visible at night than the orange or lime fabric itself.
Driving safely is a driver's responsibility, but many drivers don't take up the mantle. Your safety is your responsibility. I'd rather prudently choose not to exercise my rights as a cyclist than be hit by a car.