What should you do with a child who has very bad behavior?

I'd examine why he is behaving badly. Is he getting enough food/sleep/attention? Am I giving into him too much? There are lots of different reasons to why a child is acting up. I'd discuss the problem with the child.

I have some question. how old is your son? are both parents in the home? what kind of behavior is "very bad behavior"? one peace of advice i have heard is don't raise your kids to like you today raise them to like you when they are over 21. I also believe you can be 100 percent rules and does and don't thats fine but it must be balanced with love. I have a very hard uncle that was very authoritative but doesn't show love every well. His kids have all rebelled and moved away. I was raised to respect my Mom and Dad and you followed the rules that were set before you and there was not talking about it however i know that my parents loved us and they were firm but far. And believe me I got my share of "spankings" (can I say that word). Kids will live up to you expectations. Expect, honesty and respect and except nothing less. Good luck

My daughter is totally defiant and will do anything just to get at me. I have a handicapped child also which requires alot of care so this behavior is stemming from lack of attention.. It's hard. I learned that time out works with her she hates. She gets 5 minutes (1 minute per year of age) and it is like an eternity for her, things are getting better around her now. Maybe time out will work for you.