okay, here's how superstitious I am, I love the black cat across the road and cuddle it and everything (but then my cat hates me until I shower and get changed), thirteen is my lucky number, and i have spilt salt on lots of occasions.
And sugar. And pepper. etc.
You can sort of see the sense in some superstitions though, I don't walk under a ladder because I think it will fall or i'll nudge it or trip or something. My sister left her shoes on the table once and my mum got her in trouble, she said "this is an eating surface and you put dirty shoes on the table! now I'll have to clean it!" she gets angry with the salt thing for the same reason. And I can never get out the door if i open my umbrella inside - it's really big! and if i do i end up poking someone in the eye.