Remember what it was like for you as a teen. The mind has built in defense that causes us to remember the good and ignore the bad. But those memories are still there. Dig deep and meditate on what it felt like to be a teen. This will give you more empathy for them and empathy will give you more patience to teach them.
Respect is a reciprocal commodity.
The more you give, the more you gain. The truth is that most teens don't respect adults because they don't feel respected. The challenge is to mutually respect your teen when frustrated by his or her behavior. Respect is not the same as acceptance. You don't have to accept a teen's behavior to be respectful.