I have this weird childhood superstition thing about banana peels. When I see a peel on ground outside - it's bad luck. If I see another banana peel some time during the day it cancels out the bad luck and I'm back to neutral.
I was just walking the dog and saw a peel on the ground and thought "oh shit. bad luck". 2 steps later I saw another peel and was instantly awash with relief.
I'm 40 years old!! *laugh*
What childhood superstitions do you still carry around?