On the first tee, all golfers would usually say "Play well" but to be honest, that is the last thing you would say to a fellow golfer until you shake hands on the 18th green ( in regards to playing well )
In the world of the arts, like movies and music, you tell them to break a leg. That way you don't "jinx" the luck.
On the highway, a simple "thumbs up" works fine.
Saying "good luck" while smiling is good, too.
have a nice bite
"Good luck" is a wish for a fortunate experience.
It's bad luck to wish a stage performer good luck, so you therefore wish him to break a leg.
to wish them well yes also just like brake a leg but brake a leg means good luck and good luck means wish you well
have a blast success!
I wish you the very best for a speedy recovery.
Break a stick
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Selamat maju jaya
You say "Break a lens."
To wish to have Good Luck!
say thank you for giving me good luck or walk away and give them a smile