1. Work towards the greater good.
2. Protect who and what you value, even from yourself, if need be.
3. What others think about you doesn't matter. If people judge you for who you are, they're not your friends.
(Just to clarify, this isn't the same as correcting somebody when they're wrong.
4. Don't pick on anybody who can't fight back. (unfortunately, there is a huge douche faction among gangstas who violate this rule A LOT)
5. Keep improving, the world never stops changing, and neither should you.
6. Pay your debts and dues, and fulfill your promises.
7. Family and friends matter. Know where your loyalties lie.
8. Respect everyone until there's a good reason not to.