Zack Friedman has a wide leadership knowledge. He is a well-known lecturer, TV commentator, and author of a column in Forbes magazine. Friedman is the founder of the personal-finance company Make lemonade. His lemon and lemonade life theory also finds a place in his book The Lemonade Life.

The Lemonade Life is an inspiring book that looks at five easy principles that could make our life what we dream of. This can only happen if we dare to be daring disruptors and follow our own rules, improve constantly, and are not afraid to take risks. That way, we will make better decisions in our daily lives, and our decisions make us the people we are.