I had a CPR training session today. I learned you're not supposed to slip the unconscious victim the tongue while giving mouth to mouth.

Bonus medical advice from a non-professional: When your tooth gets knocked out (from playing sports or joining your local Fight Club) I guess most people know it's best to either put it back in its socket or to put it in milk and get thee to a dentistry. I learned if you don't have milk with you, putting the tooth in contact lens solution or Gatorade also works.