Rule #1. Life is not fair. Get used to it. The average teenager uses the phrase "it's not fair" 8.6 times a day. You got it from your parents, who said it so often you decided they must be the most idealistic generation ever. When they started hearing it from their own kids, they realized Rule #1.
Rule #2. The real world won't care as much about your self-esteem as your school does. It'll expect you to accomplish something before you feel good about yourself. This may come as a shock. Usually, when inflated self-esteem meets reality, kids complain that it's not fair. (See Rule No. 1)
Rule #3. Sorry, you won't make $50,000 a year right out of high school. And you won't be a vice president or have a car phone either. You may even have to wear a uniform that doesn't have a Gap label.
Rule #4. If you think your teacher is tough, wait 'til you get a boss. He doesn't have tenure, so he tends to be a bit edgier. When you screw up, he is not going ask you how feel about it.
Rule #5. Flipping burgers is not beneath your dignity. Your grandparents had a different word for burger flipping. They called it opportunity. They weren't embarrassed making minimum wage either. They would have been embarrassed to sit around talking about Fifty Cent all weekend.