The action plan is a statement of intentions rather than a commitment. It must not become a straitjacket. It should be revised often, because every success creates new opportunities. So does every failure. In addition, the action plan needs to create a system for checking the results against the expectations. Effective executives usually build two such checks into their action plans. [..] The action plan has to become the basis for the executive’s time management. Time is an executive’s scarcest and most precious resource.
- From “The Effective Executive: The Definitive Guide to Getting the Right Things Done”
by Peter F. Drucker