The people who get nothing done often work a great deal harder. In the first place, they underestimate the time for any one task. They always expect … - Peter Drucker

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The people who get nothing done often work a great deal harder. In the first place, they underestimate the time for any one task. They always expect that everything will go right. Yet, as every executive knows, nothing ever goes right. The unexpected always happens — the unexpected is indeed the only thing one can confidently expect.