Even if you know how to structure your day with good time-management skills, the ability to focus or experience "flow," that state of being in the zone, can be more elusive. This means you can concentrate "single-mindedly until the job is complete," Tracy said.
Some say focus is the characteristic that sets entrepreneurs apart from other smart people.
Focus on the customer is also an important characteristic.
"You have to maintain a relentless focus to always do what is best for the customer," Graham said. "They're the be-all and end-all, and the reason for business in the first place."
This is another point that Bezos, the richest person alive, can agree on. He said at a recent talk that he attributes his success to an "obsessive-compulsive focus on the customer as opposed to obsession over the competitor."