Be mindful of blind spots. Cars have tons of them. Assume that if you're anywhere between their rear and front lights they might not see you.

Never be next to the middle of buses or trucks on intersections, while turning their body will be displaced towards you, lots of people have died that way.

Ride defensively. This means, assume cars will not obey traffic laws, assume they might not yield, assume they might skip that red light. Until you're certain a car is stopping, don't put yourself in a situation where you your wellness depends on that car stopping.

BE WEARY OF DOORS. If you ride close to parked cars, you will get doored, that's a guarantee. Always keep a safe distance from parked cars. If for some reason you gotta stick close to them, use their mirrors to look into the car and ride slowly.