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.
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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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Placing a hat on the bed is, apparently, bad luck. (South Carolina)
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An acorn at the window will keep lightning out
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According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
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Amber beads, worn as a necklace, can protect against illness or cure colds.
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In some parts of England, rum is used to wash a baby's head for good luck.
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If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
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