How do I hang a horseshoe for good luck? Is the opening at the top or bottom of the "U"?
Some people think the points of a horseshoe should be pointing up so that it holds good luck. If the points are down, good luck will fall out. Others believe with the points down, good luck flows through your home or can fall over bad luck at your doorstep.
For more on superstitions about horseshoes—from a skeptical perspective—visit CSICOP's page on horseshoes.
—The Fact Monster