" people, like companies, can have core competencies too. The same Hamel-Prahalad three-part definition can still apply. An individual’s core competencies are best thought of as abilities that can be leveraged across multiple spheres. They should be important and meaningful. And they should be the things we do best and that others cannot do nearly as well. "

― Laura Vanderkam , 168 Hours: You Have More Time Than You Think