JPMorgan CEO Jamie Dimon shares his rule for better leadership: avoid making decisions when tired

JPMorgan CEO Jamie Dimon advises against making major decisions when exhausted, particularly on Fridays, to avoid poor judgment. He learned this lesson over decades in banking, noting that mental fatigue at the end of the week impairs cognitive function and increases the risk of mistakes. Dimon also stressed the importance of emotional discipline, warning that decisions made out of anger or stress can be equally detrimental.