Here is an article with some practical advice. Getting our kids to obey can be frustrating at worst, challenging at best.
Source: How to get kids to obey
To the author’s helpful suggestions, I would like to add the following: the most effective way to get your children to obey you is to model obedience to them. We must acknowledge and respect those in authority over us: God, the Church, the State (to some extent), our boss at work, and so forth.
Go to Mass every Sunday and confession at least once in awhile; obey traffic laws; pay your taxes; put in an honest day’s work, and never lie, even a little. Obey your marriage vows wholeheartedly.
“Do as I say, not as I do,” never works. Ever.