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.
105
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
24
Placing keys on a table is considered unlucky. (Sweden)
3
Collect seven or nine different flowers on midsummer eve and place them under your pillow and it is said that you will dream of your future spouse. (Sweden)
463
Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
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.
70
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
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.
75