Don't cut your hair in March or you won't see the next March.
Count the stars in halo around moon. That's how many days it will be before it rains. No stars, rain tomorrow.
Only one clock per room. If more than one it will bring bad luck.
When it rains and the sun is out means devil is beating his wife, the angels are crying and it will rain the next day.
If black cat crosses in front of you, make an X sign to ward of the bad.
Always leave from the door that you entered from.
So many, can't think of them all. lol