If you’ve ever watched “The Mentalist” then you’ll see Patrick Jane doing it all the time. He is constantly touching peoples hands and arms when hes talking to you which helps him form a stronger connection with that person, even though the show is fictional, Positive Reinforcement is very real. You’ll also notice that he’s always complimenting people.
Positive Reinforcement isn’t just about touching someones arm, because if you walked up to someone you didn’t know and started touching their hands and their arms, chances are they’re going to feel pretty uncomfortable and will probably want to get out of there as soon as they can. You should start off by giving them a compliment, mirroring will also help in this type of situation too.
So next time you’re meeting someone and you’d like them to trust you and like you pretty much instantly, then use a mixture of Positive Reinforcement and Mirroring and they’ll trust you fairly quickly and they’ll probably feel as if they’ve known you a lot longer than a couple of hours.