Throw the TV into the garbage. [See John Rosemond's web page or pick up a book on how to do this.] Cancel all the teen magazines. Start doing things together as a family instead of separately. [Meaning, cancel your weekend time with the buddies or your golf game or whatever.] If your children are still relatively young they will just enjoy the time with you and as the relationship strengthens they will not rebel just because they love you.
There are other obvious steps. Join a church or become more actively involved. Volunteer to build houses or go on mission trips to Mexico so your children can see how unimportant clothes really are. Homeschool your children. Get involved with other families who share your beliefs (thereby subtly changing the children who become your children's friends). Have a faith-centered family life that includes prayer and Bible study.
Sorry, philo -- I probably gave you more than you wanted. But raising children in today's world takes active work with a focus to keep them away or separate from the evil out there.
That is right. Keeping them separate from this corrupted culture. It is a task, and if you send them to public school, your task become almost impossible.