I was thinking of my own version of Gibbs' rules because a lot of his rules dont apply to most of us but some still do. Please feel free to add your own, these are mine:

Rule #1: Always have perseverance.
Rule #2: Always be confident in your decisions.
Rule #3: Don't believe what you're told, double check. (From Gibbs' rules)
Rule #4: Never overstate a thought.
Rule #5: Always use common sense.
Rule #6: Never, ever get involved in politics.
Rule #7: Always be specific when you lie. (From Gibbs' rules)
Rule #8: Never take anything for granted. (From Gibbs' rules)
Rule #9: Never go anywhere without a knife. (From Gibbs' rules)
Rule #10: Never beg.
Rule #11: When the job is done, walk away. (From Gibbs' rules)
Rule #12: Always stay true to those you care about.
Rule #13: Trust has to be earned.
Rule #14: Everyone's human, never make them more than that.
Rule #15: Always work as a team. (From Gibbs' rules)
Rule #16: Never throw the first punch.
Rule #18: It's better to seek forgiveness than ask permission. (From Gibbs' rules)
Rule #19: There is always someone on your side.
Rule #20: Always think 3 steps ahead.
Rule #39: There is no such thing as a coincidence. (From Gibbs' rules)
Rule #40: If it seems like someone's out to get you, they are. (From Gibbs' rules)
Rule #45: Clean up your messes. (From Gibbs' rules)