When Mera Rubell met her future husband Don, a medical student, the two quickly discovered that they shared two powerful passions -- for each other and for art. Together, they built not just a business empire but one of the most important private contemporary art collections in the world.

Frank Toskan tends to shy away from the media and rarely boasts about his success, even though he was responsible for opening some 300 MAC Cosmetics stores worldwide in just 15 years. This is the first in-person interview he's granted in more than 15 years.

I've talked with successful CEO's, authors, chefs, politicians, designers, artists, philanthropists, doctors and entrepreneurs, but I've yet to interview a sports star for advice on business. Since Agassi was my all time favorite, I was eager to hear his insights on how to achieve success.

Peter Diamandis' conversation style is high octane and motivational; he is so energized that he could easily be the poster boy for Nike's 'Just Do It' campaign. He advises us to bulldoze our way through bureaucracy, fail early, fail often and explore multiple projects.

Former Mayor Richard M. Daley helped transform Chicago from a place that had been beset by scandal and racial divisiveness to one of America's best-run cities. Here, Mayor Daley talks about the importance of building trust, maintaining relationships, and inspiring teams; all with an eye on moving the core agenda forward.

Mayo Clinic's president and CEO not only teaches us to surround ourselves with smart people and listen to them but urges us to exercise integrative thinking, to encourage innovation, and to lead through serving.

"Your first job will not be your best job. Keep improving your skills, broadening your experience, your knowledge, your ability to think and work with others, and never give up. Damn the headwinds, keep rowing forward."

Office environments are as varied as the companies that they house. Whether it is Google's campus-like Mountain View headquarters or a fun and wild setting like Zappos' Las Vegas offices, there are so many more exciting options now than there were decades ago.

A conversation with world renowned architect and designer Zaha Hadid explores the struggle to succeed as a woman, the importance of collaboration in realizing a complex vision, and the rewards of mentoring and working with the next generation.

Insights about business can be gleaned from almost any good book -- whether it's a memoir by a professional athlete or a page-turning account of the ups and downs of a frenetic political campaign.

"One of the most interesting and challenging parts of my job is being equally creative and business-minded in every aspect of our company. I've never been to design or business school, but in some ways that has helped me because I didn't think about impossibility. I've learned on the job and trusted my instincts."

This week's conversation is with Tony Hsieh, who built one of the largest online companies in the world, Zappos.com. "My first 'job' was as a newspaper boy. It made me realize that I didn't want to spend my life delivering newspapers."

This week I spoke with food entrepreneur Mario Batali: "Prove you can do something for someone else first and do not be afraid to work well below your pay potential to get essential experience at the ground level. All great workplace leadership positions merit five years of practice."