These days it's increasingly rare to have a stable career in any field. More and more of us are blending big company jobs, startup gigs, freelance work, and volunteer side projects. We take chances to expand our knowledge, capabilities, and experience. But how do we make sense of that kind of career-and explain it? Pamela Slim, the acclaimed author of Escape from Cubicle Nation, gives us the tools to have meaningful careers in this new world of work.