One of the people I spoke to who have mastered the art of focusing under pressure is David Boies, the attorney.

FORBES: Magazine Article

Apparently white people haven't yet mastered the art of making a ringback tone that sells, because the Caller Tunes chart is dominated by hip hop acts, with Lil Jon (aka Mr. Crunktastic) grabbing the top two spots.

ENGADGET: Lil Jon dominates T-Mobile Caller Tunes (aka ringback tones) chart

At present, only eleven people over 50 years of age remain who have mastered the whole set of techniques.

UNESCO: CULTURE

Successful people who have mastered a particular skill are never satisfied with the status quo.

FORBES: The One Leadership Trait That Separates Superachievers From Underperformers

Lenovo has mastered the art of selling cheap computers to people with not many yuan to spare.

ECONOMIST: Schumpeter

People continue to cook at about the same rate from the moment that they have mastered the art until the moment they die or are too decrepit to continue.

ECONOMIST: Human evolution