If there is one ‘secret’ of effectiveness, it is concentration. Effective executives do first things first and they do one thing at a time.
The Author of this Quote
![Peter F. Drucker](/_next/image?url=https%3A%2F%2Fassets.heroic.us%2Fauthors%2Fheadshots%2Fpeter-f-drucker.jpg&w=640&q=75)
Author
Peter F. Drucker
Management consultant, educator, author, and "the founder of modern management".