One of the biggest mistakes entrepreneurs make is not understanding the relationship they have with their investors. At times, they confuse VCs with their friends.

The Lean Startup is a process for turning ideas into commercial ventures. Its premise is that startups begin with a series of untested hypotheses. They succeed by getting out of the building, testing those hypotheses and learning by iterating and refining minimal viable products in front of potential customers.

Value Proposition Design is a 'must have' for anyone creating a new venture. It captures the core issues around understanding and finding customer problems and designing and validating potential solutions.

Schools reward their students for a combination of intelligence, perseverance, and hard work - in the classroom and on the playing fields. But these metrics don't help kids understand that great grades are not a pass for a great life.

I placed too much importance on comparing how much I had to others early on. Then I started realizing time was a far more valuable asset. When I started using money to create more time, I appreciated both more.

Each time you go to the grocery store with your kids, it is a potential learning opportunity. In order not to overemphasize materialism, focus on other things to do with money. In 'Beyond the Lemonade Stand,' I try to emphasize the importance of saving money, and of using it to help other people.

We must always embrace individual liberty and enforce the constitutional rights of all Americans-rich and poor, immigrant and native, black and white.

This is a wonderful planet, and it is being completely destroyed by people who have too much money and power and no empathy.