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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According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
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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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Before traveling a person should, apparently, sit on their luggage. (Russian)
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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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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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An acorn should be carried to bring luck and ensure a long life.
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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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