The leadership skills of the manager may be the most important factor in achieving desired results.
There are many leadership styles, which can be boiled down to two distinct categories: the calm and collected and the loud and angry.
Both categories have strengths and weaknesses, and both can and do influence their subordinates to act. But without a doubt, the calm, collected leader more often than not prevails over the loud, angry leader.
Great leaders embrace the process of discovery by never giving up the quest for information. They control their destiny so that no one else controls it for them. They are never 100% satisfied, because there is always room for improvement.
To be an effective manager, you should know that people do better in a positive environment of acceptance and understanding.
Source: Steven D Armstrong: You Can't Lead From Behind: What I learned in combat about leadership, people, and profit.
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