James R. Warren Jr.

“If there is any one “secret” of effectiveness, it is concentration. Effective executives do first things first and they do one thing at a time.”
― Peter F. Drucker, The Effective Executive

“The effective executive, therefore, asks: “What can my boss do really well?” “What has he done really well?” “What does he need to know to use his strength?” “What does he need to get from me to perform?” He does not worry too much over what the boss cannot do.”
― Peter F. Drucker, The Effective Executive

“Keep your eye on the task, not on yourself. The task matters, and you are a servant.”
― Peter F. Drucker, Managing the Non-Profit Organization: Principles and Practices

“It takes far more energy and work to improve from incompetence to mediocrity than it takes to improve from first-rate performance to excellence.”
― Peter F. Drucker, Managing Oneself