Do what you can to be visible, wearing bright colors and using bright bike lights. Assume most drivers are not paying attention, and expect that 20% of cars have tinted windows that will interfere with their ability to see at dusk and night.

I'm mostly a walker, but I get treated very differently (better!) when I have a bright vest on. Drivers are more likely to stop for me when I'm trying to cross the street than when I'm in my regular outerwear. I assume it's because I stick out in the streetscape.