"Thanks, you too."

I know I'm boring.

I've always liked, "Don't tell me what to do!" ?

I'm too chicken to use Carlin's response (in the grocery checkout): "Yeah, yeah, yeah, will ya give me my fuckin' change, please?" LOL!

This doesn't answer your question but I think it's marginally relevant: Here in the UK many (most?) people mock 'Have a nice day'. However I use it frequently because so many of us Brits don't seem to care whether you have a nice day or not. For me it gives out a good positive sentiment and when I say it I really do mean it. Maybe I am really trying to say: Come on fellow British, let's give out a good message much more and try to mean it.

Don't tell me what to do !!!

I just say ..you too. Cheers.

What else can you say?

Thanks, you have a nice day too.

I say "same to you friend" and be kind.

Thanks for the warning??

I tell people to "have a nice day" all the time. When they wish me a nice/good day, I just say "thanks, likewise" to the person and move on. I rather like it better when people wish for me to have a nice day vs. the other stuff most people say. But when they "god bless you" at me, I say "thanks, likewise" just the same. As long as someone is honestly wishing me well, I don't care how they do it. I honestly thank them back, because no one is obligated to wish me any kind of well at all.

I don’t have a clever answer for that one, but when someone says, “You have a nice one,” I sometimes say, “Where did you hear that?” It seems to confuse almost everyone.

I smile and say "You too!" or some variation thereof. Why be a jerk when someone's just trying to be nice? Not enough nice in the world, honestly.

'Don't tell me what the hell to do!'

I usually just smile and say uh-huh. Anyway it's nice to meet a fellow scouse on this site. I was born in the pool and lived in Garston and Allerton.
We emigrated in 1954 and have lived in Canada since then except for 56 and 57. I went to the Liverpool Institute (fondly known as the instinks)
and I went there with two of the future Beatles, Paul and George. My nan had tea a few times a week with John Lennon' s aunt who raised him. They lived on Verney Crescent. Hope you are well. I won't say have a nice day...its a worn out phrase with no sincerity. I'll just say...i hope you are having a wonderful life. Cheers.

Fuck off!!

I just say "likewise" or "don't jinx it!" it depends

I just say thank you and wish them the same.

Never said more that "you do the same". It's a throw away, and I answer with a throw away.

Thanks, same to you? Lol

"Thank You" has ALWAYS worked for me.

I usually say have a good one.
Leaves their options open.

I use this too much, have no idea what else to say. When I get to know the people better I have different comments.

I'm in Australia where it's usually too warm to have an ice day.

The warmth brings flies, which encourages us to keep our mouths shut.

So we usually just nod and grunt.

i say you have an ice day too...nobody ever understands me