If you have more then one child, fighting is going to happen. That's how alot of children express their feelings. I noticed that with my two older kids, that when a fight occurs, smacking is never the answer. And yelling never helps. What I do is simple and effective, although it may not work for all. First, don't intervine, until necessary. Some times arguing is all that comes out of it. When things look like they may get physical, they've had enough. Second, don't yell, talk. Ask your children to explain to you what the fighting was for, and how it helped the situation. And last, I feel that smacking your children for fighting shows them that that sort of behavior is acceptable. A good way to discipline for kids after a fight, is to sit them on the couch, and have them hold hands. The sitting part of that will give them time to think about the issue at hand, and the holding hands.... well, most children find that the world is ending. It not only punishes, it teaches them to love. Usually, this process takes 5 minutes. Once they've sat there with each other, talk some more. Explain that fighting is inappropriate, and doesn't solve anything. Just talking to your kids can make a difference.