The 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 PowellIn the military, we are also taught to only use one third of the available decision-making time, so that our subordinates have time to go through their own decision processes when they learn what we want them to do.
Colin Powell