I thought of two more that have really made a difference in my life:
1) the worst thing that will happen if you make a request is the person will say "no," so go ahead and ask; I used to be afraid to ask people for anything, knowing this has given me a new boldness (make sure that a "no" answer is an acceptable risk)
2) sometimes forgiveness is easier to get than permission (again, use good, cautios judgment on this, sometimes the price is too high, but sometimes it is ok)
Throughout the trials and tribulations of life we are fortunate to learn significant life lessons and become more knowledgeable and wise. If someone you cared about asked you for your top three pieces of advice, what would be the three things you would tell them?