Do You Have Any Friday the 13th Superstitions?

It's Friday the 13th, for some a very 'unlucky day,' for others the 13th is just another day and yet for many it is a lucky day! To each his own, it just depends on whether or not you are a superstitious person. I'm not necessarily, but the one thing I will always do and anyone who knows me sees me do this all the time....

I knock on wood. lol I don't need any bad luck in my life, so every chance I get I do it. What are some of the most common superstitions, I'll make a list of those I remember or have heard. Do you believe in or swear by any of these?

• don't walk UNDER a ladder
• don't let a black cat cross your path
• don't break a mirror or you will have 7 years of bad luck
• bad luck comes in three's
• do not open an umbrella indoors