Ran into this on hackernews and thought it would be cool to save a copy here. Seems like good advice.

Principles of Adult Behavior

• Be patient. No matter what.
• Don’t badmouth: Assign responsibility, not blame. Say nothing of another you wouldn’t say to him in the same language and tone of voice.
• Never assume the motives of others are, to them, less noble than yours are to you.
• Expand your sense of the possible.
• Don’t trouble yourself with matters you truly cannot change.
• Expect no more of anyone than you can deliver yourself.
• Tolerate ambiguity.
• Laugh at yourself frequently.
• Concern yourself with what is right rather than who is right.
• Never forget that, no matter how certain, you might be wrong.
• Give up blood sports.
• Remember that your life belongs to others as well. Don’t risk it frivolously.
• Never lie to anyone for any reason. (Lies of omission are sometimes exempt.)
• Learn the needs of those around you and respect them.
• Avoid the pursuit of happiness. Seek to define your mission and pursue that.
• Reduce your use of the first personal pronoun.
• Praise at least as often as you disparage.
• Admit your errors freely and soon.
• Become less suspicious of joy.
• Understand humility.
• Remember that love forgives everything.
• Foster dignity.
• Live memorably.
• Love yourself.
• Endure.