The more an executive focuses on upward contribution, the more will he require fairly big continuous chunks of time. The more he switches from being busy to achieving results, the more will he shift to sustained efforts—efforts which require a fairly big quantum of time to bear fruit. Yet to get even that half-day or those two weeks of really productive time requires self-discipline and an iron determination to say “No.”
The penalties of task-switching, Makers' Schedule Manager's Schedule (essay), The Power of No (Altucher)
