Hike on the Appalachian Trail. One day. Three days. A week. A month. Seven months. Pick a time frame, and do it.
Confront friends and family members who hurt you. Draw the line, for once, and dare them to cross it. If they don't, that's progress. If they do, cut them out of your life. You don't need it.
Know thine enemy. The information will come in handy later.
Live in New York City for at least a year.
Stand up for things you believe in - no matter the cost.
Stand up for others, even strangers. Humanity deserves it, and the world always needs more good karma.
Protect your integrity at all times. No one (and no job) is worth the chipping away of your self esteem.
Write. It doesn't matter what you write or what form it takes or even if it's good. Just write. Often.
Take lots of photographs. Document your life and your adventures. You'll be sorry you didn't.
Drive through Arizona, New Mexico, west Texas. Just you, a car, Led Zeppelin and miles and miles of nothing except rocks, cacti and rattlesnakes. What could be better?