Aim for T-shaped expertise: broad knowledge across many areas but deep specialization in one high-leverage skill

Eben describes the T-shape model: 'ideally we're looking for the t, the t shape. Okay. So we're, an inch deep across the top, okay, like a capital t, has a crossbar across the top, And we're also a mile deep in one particular area.' He explains most successful people have various experiences but real deep expertise in one particular role or skill.