Placing keys on a table is considered unlucky. (Sweden)
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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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Breaking a mirror is said to bring bad luck for 7 years. To "undo" this, take the shards of glass and bury them underneath the moonlight. In ancient times, the mirror was said to be a window to the viewer's soul. If that mirror were to break, it would
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An acorn at the window will keep lightning out
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An acorn should be carried to bring luck and ensure a long life.
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Some motorcycle enthusiasts hang a biker's bell from a portion of their bike to protect themselves from evil road spirits.
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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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Amber beads, worn as a necklace, can protect against illness or cure colds.
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