Nothing that I think has any real bearing on luck, but one of my personal habits is to always eat the fortune cookie before reading the fortune. You have to accept your fate completely before the fortune can come true.
I'm not sure what to answer, but I'm a religious one, so if this was the meaning of question!
But if you are asking if you will notice a strange acts from me in real life as a muslim afraid from somethings from a superstitious believes! no you will not notice a thing like afraiding from number 7 or 13, or putting a rusty nail in a lemon, or throwing salt over your shoulder, or walking under a leader, etc... .
No you wont find me believe of any of these, but my believes are like the Doomsday and the Divine Power. Not sure if it's labelled under "Superstitious"..