Acccording to Old Polish Wigilia lore, if the first person to visit your home on Chrsitmas Eve is a woman, that means bad luck in the year ahead.
I know. I'm taking this a step further and not even calling people first, waiting for my hubby to dial and joining the conversation later.
Another belief is that how you are on Wigilia you'll be the whole year.
That's another superstition I like :)