Apple CEO Tim Cook keeps his email address public, and says he starts each day at 5 a.m. reading customers' feedback

• Tim Cook told GQ that he starts every day by reading emails from customers at 5 a.m.
• He said it's inspiring to understand how Apple's technology is impacting lives – both good and bad.
• Open emails are a way to show that the company is motivated by customer feedback.

Apple CEO Tim Cook starts every day at 5 a.m. by reading emails and notes from customers about the impact of its technology, he told GQ.

"If you're in the business, like we are, of creating technology that really enriches people's lives – you want to know what it's doing," he said. "You want to know how people are feeling about it."