A big sloppy wet kiss followed by a swift kick in the pants, just as a warning, in case they misbehave.
Just kidding.
My place is hard to find the first time. There are almost no street signs, and the house numbers don't follow in any discernable order.
My doors are not built so as to be able to attach a lock box.
The lock and key require explaining for guests who are not used to the hardware here.
My large dog barks her head off at any new person who comes to my gate.
I host a bedroom/bath in my home.
So, no self-check in. I actually pick the majority of my guests up at the local bus stop. Some walk in from town, following the map I send them, some arrive by taxi.
The first order of business is to shut the dog up (if I pick them up at the bus stop, this isn't an issue- the dog comes running over to the car, tail wagging, all excited), greet my guest, and let them know the dog might look and sound ferocious, but is actually quite sucky after making one's aquaintance. Many of my guests end up really bonding with her- they say they'll miss her. (They don't mention that they'll miss me)
Then we usually sit down at the outdoor dining table on my terrace for a few minutes, I'll get them a glass of water or some iced tea, we exchange a few words about how their trip was, then I show them up to their room. Give them the basic info on how everything in their space works, but try not to overload the info at this point. Tell them I'll give them a chance to get settled in, shower, have a lay down, or whatever, that I'll be downstairs and when they're ready, to come down for a coffee or tea (if I know they've had a long travel day, I'll often make them a snack at this point) and I'll go over where to find everything in the kitchen, where the drinking water is, etc. and give them a set of keys and make sure they can figure out how the front door lock works, in case I'm not at home when they come back during their stay.
At this point they may say they've had a long trip and just go back up and have a nap, they may go into town and to the beach, or we might end up sitting and chatting for awhile.
It's all pretty laid-back and I get a feel for whether they want to be super chatty and friendly, or whether they just want to do their own thing, and respond accordingly.