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.
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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.
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Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
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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.
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Before traveling a person should, apparently, sit on their luggage. (Russian)
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Placing a hat on the bed is, apparently, bad luck. (South Carolina)
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Amber beads, worn as a necklace, can protect against illness or cure colds.
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Placing keys on a table is considered unlucky. (Sweden)
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