Across a couple of Reddit threads , users shared some fun psychology tricks you can try on unsuspecting folks. #4 My favourite psych trick is to hand a random object to people for no reason while having a conversation with them. Once they're really into the conversation, hand them something like everything is completely normal, and chances are, they'll take it. #6 I read The Psychology of Persuasion by Robert Cialdini after Tom Scott recommended it in an old video. Say for example you're going to buy a new suit and a sweater.