Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
It's bad luck to leave a house through a different door than the one used to come into it.
143
Amber beads, worn as a necklace, can protect against illness or cure colds.
89
An acorn at the window will keep lightning out
93
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
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
In Asia, the digit 4 never appears in any Nokia handset model number, because 4 is considered unlucky in many parts of Southeast/East Asia.
78
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117