Decide and make it clear whether a teenager can borrow your car, clothing or other possessions. Reasonable consequences for breaking house rules include loss of telephone, TV, stereo and car privileges. Working for the money to repair or replace damaged articles is also appropriate. For behavior that's more serious, you may need to ground him for a day or a weekend. Use family conferences to negotiate house rules.
Some families find it helpful to have a brief meeting after dinner once a week.
It gives you and your teen a definite opportunity to ask for changes in the rules or to bring up family issues that are causing problems. Families often function better if decision making is democratic. When your teen's in a bad mood, she generally won't want to talk about it. Give her lots of space and privacy at such times. Try to avoid talking to her about any topic, pleasant or otherwise, at this time.