As long-time readers of this site know, I like the slogan "Fast is Slow, Slow is Fast."
Taking careful aim and hitting the serious targets requires perspective, courage, and focus. You may appear to be moving slowly, but you are methodically achieving the items that need to be achieved.
The perspective and focus components may be obvious. Why is courage essential? Because you need to have the courage to resist internal and external pressures to rush.
Admiral Rickover, reviewing the history of the nuclear submarine program, gave what I believe is the best description of the trait. He called it "courageous patience."