1. If you are attacked by a shark, act like you're really into it. Maybe the shark will get creeped out and leave you alone
  2. Be rude to lifeguards so any sharks within earshot will think you're cool
  3. Don't go swimming within 30 minutes of covering yourself with fresh lambs blood
  4. Eat a lot of kimchi before swimming. Sharks hate anything fermented.
    Suggested by @EricElkins