Nervous about impressing boyfriend's mom

Ok. So.. tomorrow me and my boyfriend are going to pick up his mom from the airport. I'm really really really nervous that she is going to be judging me left and right!! My boyfriend said that she would do most of the talking, but I'm still nervous.. I...

want her to like me... What do I do???

The best thing to do is to be polite as possible. Say please, thank you , excuse me often. Be courteous. Manners are a sign of class and a good upbringing, which is something she will look for.