Be nice to nerds. You may end up working for them. We all could.
Flipping burgers is not beneath your dignity. Your grandparents had a different word for burger flipping; they called it opportunity.
Life is not fair; get used to it.
If you mess up, it's not your parents' fault, so don't whine about your mistakes, learn from them.
Life is not divided into semesters. You don't get summers off and very few employers are interested in helping you find yourself. Do that on your own time.