Before Mint.com, I was a long-time user of 'Microsoft Money' and Intuit's 'Quicken.' Both were powerful tools, loaded with features and functionality around taxes, investment, budgeting - too feature-laden, in fact. They took hours to set up, forever to learn, and an hour a week to maintain.

The original idea before Mint was a life and goal planning system I called Carpe Viva. The idea was that all of life's goals, from buying a house, getting an MBA, or learning Spanish could be quantified in both time and money.

Carefully calculate the potential size of your market to make sure you can grow. Before starting Mint, I knew that there were about 20 million people who had purchased 'Quicken' or 'Microsoft Money' over the years, and 80 million people using online banking in the U.S. alone.

I always knew I wanted to be a technologist, so I went to Duke and got a degree in computer science and electrical engineering. Really, I thought my goal in life was to be an inventor, a problem solver, so I thought I needed a Ph.D. to be good at inventions, but it turns out that you don't.

Have a goal. Know where you want to end up. Knowing where you want to end up is a lot easier than figuring out how to start and how to get there. You will figure out how to get there. Do not chart your career. Trust me; you do not want to chart your career.

Kids and adults alike are having their curiosity drained away by boredom in class or the workplace, and by the unremitting background noise of a dumbed-down pop culture.

As my career has progressed, I've had the pleasure of playing with the baddest jazz cats on the planet. But that doesn't change my desire to entertain folks. That's really who I am.

It's easy to imagine that because a certain company has a prestigious reputation or everyone says it's a great place to work, that it will be the perfect fit for you. But, in reality, the search to find a career is a much more individual process.