An acorn should be carried to bring luck and ensure a long life.
115
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.
208
Some motorcycle enthusiasts hang a biker's bell from a portion of their bike to protect themselves from evil road spirits.
64
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117
At times, a horseshoe may be found above doorways. When positioned like a regular 'U' it supposedly collects luck. However, when it is positioned like an upside-down 'U' the luck supposedly drains.
78
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
Placing keys on a table is considered unlucky. (Sweden)
3