An acorn should be carried to bring luck and ensure a long life.
115
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
24
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.
298
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
Placing keys on a table is considered unlucky. (Sweden)
3
Opening an umbrella indoors is said to result in 21 days of bad luck. Some traditions hold that it is only bad luck if the umbrella is placed over the head of someone while indoors.
75
At times, a horseshoe may be found above doorways. When positioned like a regular 'U' it supposedly collects luck. However, when it is positioned like an upside-down 'U' the luck supposedly drains.
78
When you speak of bad luck, it is said that one should always knock on wood. Also knocking when speaking of good luck apparently helps with having good luck. This is an old Celtic tradition related to belief of wood spirits.
208