In Asia, the digit 4 never appears in any Nokia handset model number, because 4 is considered unlucky in many parts of Southeast/East Asia.
Many believe that if all of the candles on a birthday cake are blown out with one breath, while making a silent wish, the wish will come true.
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
The superstitious symbolism of a black cat crossing one's path is dependent upon culture: some cultures consider this a sign of impending bad luck, while some cultures consider this a sign of impending good luck.
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
A single magpie is considered a sign of bad luck. A Guide to the Scientific Knowledge of Things Familiar recites an old proverb concerning the incidence of bad weather when magpies forage alone and a possible scientific explanation for this.