Peter Drucker On Leadership [the broken link was removed]
Effective leaders check their performance. They write down, “What do I hope to achieve if I take on this assignment?” They put away their goals for six months and then come back and check their performance against goals. This way, they find out what they do well and what they do poorly. They also find out whether they picked the truly important things to do. I’ve seen a great many people who are exceedingly good at execution, but exceedingly poor at picking the important things.
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