Another rule I have is: Don't let your ego get tied up in a policy dispute. Otherwise, if things don't go your way, you can end up breaking a relationship with somebody with whom you can't afford to break.
Colin PowellThe less you associate with some people, the more your life will improve. Any time you tolerate mediocrity in others, it increases your mediocrity. An important attribute in successful people is their impatience with negative thinking and negative acting people.
Colin Powell