The key is to be disciplined about the right things for success. Although rarely glamorous or exciting, the habit of doing many small things consistently right is rewarded in performance. Their survival depends on high performance, and discipline trains the mind and body to respond well to stress too. The final unseen advantage is effort. Many performers have tremendous talent and organizational abilities, but never reach their potential because they lack the effort needed for success.
Effort is a conscious application of energy in a given direction.
It is the fuel that makes everything go. Even the latest model Ferrari won't go an inch without gasoline. Your performance will not work without effort. The key to developing the best effort is to make sure your fuel is pure. Pure fuel comes from intrinsic motivation, or feeling motivated from within.