1. Think before you speak – Don't let angry words fly out of your mouth if you don't mean them. Otherwise you may have a lot of cleanup later.
2. Put yourself in the other person's shoes – If you were your mom or dad how would you feel? Where are they coming from in this situation? Do they have a point?
3. Listen – Maybe the person you are disagreeing with isn't as far off base or being as unfair as you think. Quietly hear them out, think about what they are saying and then decide how to approach the situation.
4. Focus on needs rather than conflict – Be clear about what you need instead of focusing on why you disagree. Stress to the other person that you want to come up with a solution rather then work against them.
5. Use "I"rather then "U" – For example "I really feel badly about myself when you talk about my grades in front of others"is more effective than "You make other people think I'm stupid."
6. Don't personally attack the person – Don't tell your dad he is a jerk, tell him that his opinion matters but explain why you disagree.
7. Stay calm – If you find yourself getting too angry or frustrated, ask for some time to cool off. Try to arrange a different time to discuss the topic after you cool off and have time to think about it clearly.
8. Remind yourself that fighting doesn't solve anything – Try to use your head and be more rational. Picking a fight will not help solve the situation. How can you approach the issue calmly and clearheaded?
9. Don't be too hard on yourself – Your mom or dad may not like your friend or are upset about your grades dropping but their opinions don't make you a bad person. Try to understand why they feel that way and realize everyone is entitled to an opinion even if others disagree with it. You are also entitled to your own opinions, but use them wisely and don't disrespect your parents in the process.
10. Be polite and considerate – Try to understand that your parents have a lot of things going on in their lives, just as you do. Don't let other things that are bothering you boost your anger in the heat of the moment. Try to be polite and considerate, because everyone deserves to be heard out, even you. It's the approach that you take to express yourself that weighs heavily on whether the other person listens to your concerns.

Remember, that your parents have much more life experience than you and whether you agree with them now or not, you will soon understand where they were coming from when you get older. Your parents are just concerned for your safety and well-being, talk things out peacefully, you will get more respect that way.