Elizabeth Gray said:
Well, giving more than one is ok!!
Great responses so far guys! I'd have to agree with "Be consistent" the most..that's what we are working on and one thing I've always been determined to do.
Absolutely. Be consistant. However, be consistantly biblical in training them up. It's possible, and detrimental, to be consistantly wrong in your technique. Remember, just because your children have opinions doesn't mean their opinions carry the same weight as your authority.
Here's my tip:
For every one time you have to discipline them, show them that you love them, either by hugging them or spending time with them, ten times. Obviously you don't do these back to back or you could confuse the child.
I don't know if you disagree with spanking or not but if you don't here's a very sound biblical method that will translate into alot of godly things that they should be doing later in life.
When my children break the rules I have them apologize to whoever was affected by their disobedience and make them be specific about what it is they are apologizing for. Kids often just want to say, "I'm sorry." Then, prior to the discipline, I tell them I love them and that I hope they can obey next time. Then,
I follow through. I also try to pray with them after and teach them that they should ask God to forgive them for disobeying mommy and daddy.
I also try to make the punishment relate to the offence, if possible. For instance, my daughter would regularly "forget" to put her dirty clothes in the hamper. So, I spanked her (this is to deal with the rebellion), and then I punished her. Her punishment was that she had to put everyone else's dirty clothes in the hamper for a week.
This has helped them learn responsibility for their actions and understand that when they do break the rules there will be a consequence. And, they learn that no matter what they do I will never stop loving them and forgiving them for their mistakes.
In addition to this, if I make a mistake and it affects my family, I make sure I, too, apologize to them. This is a shining moment in a child's life.

"Daddy is apologizing to me? You mean daddy makes mistakes too? Well, I forgive you daddy."

IOW, set the example.
God bless