There are numerous sailors' superstitions, such as: it is considered bad luck for a ship to set sail on a Friday, to bring anything blue aboard, to stick a knife into the deck, to leave a hatch cover upside-down, to say "pig", or to eat walnuts aboard.
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It's bad luck to leave a house through a different door than the one used to come into it.
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Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
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Amber beads, worn as a necklace, can protect against illness or cure colds.
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An acorn at the window will keep lightning out
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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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Placing keys on a table is considered unlucky. (Sweden)
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According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
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