Rainbows are known for being lucky. If you find the end you get that pot of gold. There are also 7 colors in the rainbow. The number 7 is also considered lucky.
Hang a horse shoe on the wall or above a doorway for good luck.
When we were kids we would fight over the wishbone. All of the cousins wanted to be the ones to break the wishbone at Thanksgiving.
Do you have a lucky charm?