Drucker is one of the best-known and most widely influential thinkers and writers on the subject of management theory and practice. In 1959, Drucker coined the term “knowledge worker,” and later in his life considered knowledge-worker productivity to be the next frontier of management.

1. “What gets measured gets improved.”
2. “If you want something new, you have to stop doing something old.”
3. “Doing the right thing is more important than doing the thing right.”
4. “There is nothing quite so useless as doing with great efficiency something that should not be done at all.”
5. “Results are gained by exploiting opportunities, not by solving problems.”
6. “So much of what we call management consists of making it difficult for people to work.”
7. “Meetings are by definition a concession to a deficient organization. For one either meets or one works. One cannot do both at the same time.”
8. “People who don’t take risks generally make about two big mistakes a year. People who do take risks generally make about two big mistakes a year.”
9. “Long-range planning does not deal with the future decisions, but with the future of present decisions.”
10. “Management is doing things right. Leadership is doing the right things.”