Placing keys on a table is considered unlucky. (Sweden)
3
It is bad luck to put new shoes on a bed (or a table) (comes from the tradition of dressing a corpse in new clothes and shoes and laying them out so everyone can give their respects) - (UK)
57
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
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
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117
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
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
An acorn should be carried to bring luck and ensure a long life.
115