Here’s a handy infographic/tutorial for winning Rock, Paper Scissors against inexperienced or very experienced players.
“Males have a tendency to throw rock on their first try, inexperienced RPS players will subconsciously deliver the item that won previously, and paper is thrown least often, so use it as a surprise.”
I prefer to throw a little psychology into the mix – I just tell the person, honestly, what I’m going to play. And then it becomes a question of trust. Then, sometimes I cheat. Because cheating is the best way to win.