Any Remedies To Stop Nail Biting?

Ok here's the thing, I have a nail biter in the family. Yuck! It's not cute, it's not attractive but I cannot criticize because I also bit my nails as a child. I remember back in the day my dad telling me he was going to put chile on my fingers, not that it would have helped, but he still threatened. lol 

The nail polish that my mom bought that was supposed to taste gross and in turn I would stop, did nothing. Surely we have come a long way since and there are sure fire ways to help a person 'kick the nervous habit?' Hypnosis? Fake nails? lol Do you bite your nails or know someone who does? I need tips on how to get my child to stop. What have you tried?