Aries - knocking on wood 

Taurus - picking up a penny cuz it brings luck 

Gemini - wishing on a star 

Cancer - avoids walking under the ladder

Leo - breaking a mirror

Virgo - opening an umbrella indoors 

Libra - black cats crossing their path 

Scorpio - Four-leaf clovers

Sagittarius - Friday 13th is bad luck 

Capricorn - number 4 is bad luck in China

Aquarius - the number 666 is SATAN

Pisces - crossing their fingers