Children must be trained in the Lord.
In the home there should be singing, prayer, lots of the Word of God and discipline living, balanced by grace. And, if your mate is not on board, the Lord will nevertheless honor your example. There are many fine Servants who tell of one godly parent.
Children should be taught to memorize verses as soon as they begin to speak. As soon as they are able, they should know the books of the Bible. They should participate in family devotions and they must be introduced to and taught about missions.
Children are quick to pick up on whether or not you are knit into your church. And, they will reflect you.
All children must be taught to obey the first time. If the child is given a second chance when he is reprimanded, he will develop an attitude of independence that makes it harder to learn to obey the Lord.
Never at any time should a child be the one deciding whether he will stay home from a meeting, or when it is time to leave an event.
All children learn by example. You will never be perfect, but your children will strain to look at the One you are constantly following.