To her credit, Madam Walker discerned that black women wanted to conform to white Victorian models of beauty. She was aware of the double- sidedness of her products - helping black women appear more European in look, with straight hair - but she always maintained that she was simply selling products that promoted hair growth.

Educationists should build the capacities of the spirit of inquiry, creativity, entrepreneurial and moral leadership among students and become their role model.

The animators working with these 3D models, they're artists, right? They're great at what they do. They're artful in how they move characters about.

My dad was my role model; he always did the right thing.

The business models in enterprise have changed pretty dramatically. A huge problem with enterprise software traditionally has been usually you sell to the customer and then they adopt the technology. The great thing about 'freemium' and the new way enterprise software is being sold is you get to try it first and then buy it.

Mint's business model became, 'We'll go for free, and then we'll find these savings opportunities for you.' You know, better interest rate on your credit cards, when should you consolidate your student loans, when does it mathematically make sense to refinance your mortgage, and Mint figures all that stuff out for you.

If you think about photo sharing sites, the mobile photo sharing and social, there's no competitive advantage, there's no obvious business model, so I never play with anything like that. I avoid it like the plague.

Kevin Systrom of Instagram used to work for us as a consultant in the early days of Mint. I knew him a long time ago. Maybe I could have gotten in there. But with photo sharing, I don't know if there's an obvious business model. I don't think there's a competitive, sustainable advantage.