You cannot guarantee winning every time against a fair, random opponent
Look for patterns in your opponent’s previous throws
If they repeat moves, counter the pattern
If they switch after losing, predict the likely response
Use your opponent’s habits, tells, or timing
Randomize your own choices to avoid being predictable
Start with paper more often against beginners
Against players who start with rock, use paper
Against players who copy your last move, switch to the move that beats their copy
Against players who favor scissors, use rock
Against players who favor paper, use scissors
Against players who favor rock, use paper
Stay calm and avoid telegraphing your choice
Watch for last-second hesitation and repeated tendencies
If the game is not fair or random, exploit the rules or bias