"After I shut the door and started back to the living room, he yelled something at me, but I couldn't exactly hear him. I'm pretty sure he yelled "Good luck!" at me. I hope not. I hope to hell not. I'd never yell "Good luck!" at anybody. It sounds terrible, when you think about it." The catcher in the Rye
I have stopped wishing people “good luck”. Luck does not exist and claiming it does is irrational. People who are what we think of as lucky are just more observant and open to new things. So instead of "Good luck" you really are just wishing for them "Be observant and open to new experiences".