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.

I used to work full time in an office, hiding away in my desk. Now, I have the opportunity to do something I love. And every day is a dream come true for me. I'm just generally grateful for all the love and support, and I will continue to give my 101 percent.

PepsiCo is a $63 billion company. Half the company is snacks, and half the company is beverages. We have a glorious snacks business and a glorious beverage business. We are extremely profitable. We are growing.

Between 1950 and 1951, I worked as a temporary employee in the Cologne Bureau of Statistics. From summer 1951 on, I have lived as a freelance writer with a fixed postal address in Cologne but with a continually shifting place of work.

On a personal note, I think it won't be until after I've retired that I'm fully aware of what I've done or what I've gone on to achieve in my career.