Make Up Your Mind!
Several good topics for a persuasive speech would be persuading someone to play a certain sport, or to play an instrument, or to join a club. It would be easy to persuade someone to play a sport because you could use the bandwagon appeal with the major league players. You could persuade someone to play an instrumente because of pride(vanity). You could use both of those appeals to persuade someone to join a club. Those would be very easy topics.