The following is a quote by Elizabeth Krueger author of Raising Godly Tomatoes. I have found her book and website to be the absolute best Biblical resource when it comes to child training.
"Teach obedience so you don’t have to teach anything else."
"In our home, we begin training our children to conform to the image of God when they are still small by teaching only one thing - that they must always obey us with a willing and pleasant spirit. When we start with just that one thing, we don't have to do much else. What could be more simple? Once your child understands obedience, everything else is pretty much taken care of. Henceforth, you can simply ask him to come to you and he will. You can ask him to pick up his toys and he will. You can ask him to get ready for bed and he will trot off and do so. You can even ask him to "stop crying," and he will stop. Simple. Obedience is really all you need to teach a little one."