How should parents discipline their children?

1. Consistency is key.

2. Logical consequences for their actions.

3. Boundaries - set them and stick to them every time (again, consistency)

4. Follow through - this includes not making unrealistic "threats" or threats you cannot, or are unwilling follow through on (ie. Saying "I'm going to ground you forever." - you may need to ground your child, but "forever" is not a realistic or tangible time frame for your child)

If you google "Love and Logic Parenting", you can see more information on the items above, as well as some additional, great information on this parenting style.