Discuss
Some issues should be worked out with your teen. Set aside a time to talk with your teen about the issue. Calmly explain your concerns to your teen, and what you would like them to do. Be prepared to listen to their point of view and engage in a conversation about the problem.
Maybe the problem has to do with different approaches or styles. It is important to talk with your teen to understand their perspective on the issue. After talking you will have a better idea of how to proceed. For instance you may choose to ignore instead of nag, or you may choose to ask twice and then set consequences for your teen if they fail to follow through with your request. Remember: while you have the final decision as a parent, things will go more smoothly if your teen feels they had input.
Ignore
Not every issue needs to be addressed. Sometimes parents can and should just ignore rather than nag.
Consequences
Some issues, however, require the use of consequences. For example: you tell your son that he must get a “B” on a test in order to borrow the car on Friday night. You notice that he is not spending time studying for the test and although you feel compelled to nag him to study, you refrain. He comes home with a “D” but insists on using the car anyways. In this instance, consequences will likely work best to teach your son that he is responsible for his decisions. For example, you could tell your son calmly that he chose not to study for the test, knowing what the consequences would be. Since he chose not to study, he cannot take the car. In order for this to work effectively, however, it is important to set up consequences early on and stick to them.