Sports leadership expert Jeff Janssen says great athletes exhibit these traits.
"We just gotta keep grinding away," he says.
Relying solely on your most talented players? "That's a huge mistake," says Belichick.
Talent is overrated, says the New England Patriots coach.
"Ultimately, the team has to come first even though we all have individual goals and preferences."
It's a person's "greatest asset," he says.
"I look at things totally differently," he tells CNBC Make It.
He gives the advice to the CEO of Social Sparkling Wine.
"Financial stress is one of the top stressors college students experience."
Former president Barack Obama attributes his political success to his wife.