Jamie Dimon shared a key career lesson he's 'learned and relearned' — don't make big decisions on Fridays

JPMorgan CEO Jamie Dimon says one of his biggest career lessons is to avoid making big decisions when you're tired on a Friday. John Lamparski/Getty Images JPMorgan CEO Jamie Dimon said making big decisions when you're tired is a mistake. Dimon said avoiding decisions on Fridays is a key career lesson he has "learned and relearned." He said purpose — not happiness — is what really drives success in work and life. Thinking about making a big decision at the end of a long week? JPMorgan CEO J...