What goes wrong [in long-range planning] is that sensible anticipation gets converted into foolish numbers: and their validity always hinges on large… - Robert Heller

Letting I dare not wait upon I would is a mug's game, and those who play it usually get mugged.

Management — The definition that includes all the other definitions in this book and which, because of that, is the most general and least precise. Its concrete, people meaning — the board of directors and all executives with the power to make decisions — is no problem, except for the not-so-little matter of where to draw the line between managers who are part of "the management" and managers who are not.

Never ignore a gut feeling: but never believe that it's enough on its own