If a car with bright light comes toward you at night you should?

First flash from low to high beams and back. This is a polite reminder to the other driver that he has his high beams on and that he is blinding you.

If that doesn't work, and he leaves his high beams on, check traffic out in front of you, in your lane, as far as you can see. If you lane is clear look down and to the right side of the lane you are in until he passes you. This allows you to stay in your lane and not weave.