according to my friends at the telegraph, there is a simple strategy to winning the game of rock, paper, scissors:
"Research shows that stone, also called rock, is the most popular of the three possible moves in the game. That means that your opponent is likely to choose paper, because they will expect to you to start the game with stone. By going with scissors, you achieve an early victory."
and there you have it. Use your power for good, not for evil.