
I am probably the least superstitious person on earth, I don't care about Friday the 13th, walking under ladders or counting magpies, but there is one thing that I am paranoid about, and that is that I never tempt fate. Ever.
It's silly really, because I don't even really believe in fate, but I still feel profoundly uncomfortable by doing it.
So technically, that's not really a case of bringing good luck; more a case of preventing bad luck - but I hope that answers your question!