The former Chicago educator turned one humbling management mistake into a philosophy: build the system, teach the system, then give people room to grow.

She accepted half her salary to learn the agency business. Three decades later, Lewis chose its first woman CEO - a determined operator who believes the real work of leadership is knowing when to let go.

The Vancouver operator moved from agency founder to embedded executive, then made the experiments, trade-offs and occasional wrong turns part of the marketing itself.

A failed soccer magazine taught Chris Martinez the cost of running on instinct. He spent the next decade turning a scrappy web business into Bloom Partners - and making the numbers impossible to ignore.