1. If a black cat crosses your path, it is believed that you will have bad luck.
2. It is strongly believed that bad things happen on Friday 13th. Actually, it is so, because people have a tendency to believe such things, and that's why there are more accidents that day.
3. If you break a mirror, it is believed that you will have 7 years of bad luck.
4. It is believed that a chimney sweep brings good luck. If you see him, you have to grab your button and make a wish.
5. If you spill salt, you are bound to have an argument with your family.