“The worst mistake a boss can make is not to say "well done."”
John Ashcroft, a British business executive (born 1948), as quoted in Sunday Telegraph (5 June 1988)
Misattributed
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John Ashcroft 32
American politician 1942Related quotes

Source: 1990s and later, Managing for the Future: The 1990's and Beyond (1992), p. 138
“One of the very worst uses of time is to do something very well that need not to be done at all.”
Source: Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time

“Well. Adolescence is all about making mistakes.”
Source: The Kingdom of Gods (2011), Chapter 9 (p. 200)

Ein Fachmann ist ein Mann, der einige der gröbsten Fehler kennt, die man in dem betreffenden Fach machen kann, und der sie deshalb zu vermeiden versteht.
Der Teil und das Ganze. Gespräche im Umkreis der Atomphysik (1969); also in "Kein Chaos, aus dem nicht wieder Ordnung würde", Die Zeit No. 34 (22 August 1969); as translated in Physics and Beyond : Encounters and Conversation (1971)

"The Testament of a Furniture Dealer" http://www.ikea.com/ms/en_US/pdf/reports-downloads/the-testament-of-a-furniture-dealer.pdf (1976).

Source: The Lightness of Being – Mass, Ether and the Unification of Forces (2008), Ch. 1, p. 12.