Loosen up. Relax. Except for rare life-and-death matters, nothing is as important as it first seems.
Talent without discipline is like an octopus on roller skates
Never be ashamed of your patriotism.
Nothing is more expensive than a missed opportunity.
Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.
Remember that no time is ever wasted that makes two people better friends.