Mine:

1. Learn a second language and keep up with the language your parents speak. You will regret being a brat about not wanting to speak this language especially as your family members pass.
2. The only opinions about you that really matter are from the people you respect and who respect you back
3. Being a kind humble person, who leads their political convictions with curiosity and not self righteousness is important. As that one person said: "I am no hero and neither are you."
4. Don't throw out your old media (mix cds, tapes, records, photos, zinee, etc) because you think they're embarrassing. They either will not be embarrassing later or they will become expensive and you can tell them for mad bucks.