don't wear your bridal gown before your wedding day, because old men says it's a bad luck, either your wedding will be canceled, or your husband will die...
if you saw a black cat, they say that it is a sign of bad luck...
don't sweep in your house during night time, you are sweeping the luck away from your home, they say...
every new years eve/day, family should open their doors and windows, so that bad luck and bad spirits will run away from your home because of the fire works' noise...