Effective management always means asking the right question. - Robert Heller

The difference between management and administration (which is what the bureaucrats used to do exclusively)... is the difference... between choice and rigidity.

Although he reputedly hated the label of ‘guru’, Peter Drucker was, by any standards, the greatest management guru the world has yet seen. In 1996, the McKinsey Quarterly journal described him as the ‘the one guru to whom other gurus kowtow’ and Robert Heller described him as ‘the greatest man in the history of management’, praise indeed for a man who described himself as ‘just an old journalist’.

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