Placing keys on a table is considered unlucky. (Sweden)
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Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
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An acorn at the window will keep lightning out
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Amber beads, worn as a necklace, can protect against illness or cure colds.
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Placing a hat on the bed is, apparently, bad luck. (South Carolina)
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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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If one walks underneath an open ladder it is said to bring bad luck. Sometimes it is said that this can be undone by immediately walking backwards back underneath the ladder.
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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.
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