My children have been learning lessons about entrepreneurship since they were in kindergarten, and these lessons are paying off: even though they are only 22, 18, and 15, they have already collectively launched three nonprofit organizations and several new businesses.

As a young boy growing up in rural India, most of what I knew of the world was what I could see around me. But each night, I would look at the Moon - it was impossibly far away, yet it held a special attraction because it allowed me to dream beyond my village and country, and think about the rest of the world and space.

Great entrepreneurs focus intensely on an opportunity where others see nothing. This focus and intensity helps to eliminate wasted effort and distractions. Most companies die from indigestion rather than starvation, i.e. companies suffer from doing too many things at the same time rather than doing too few things very well.

Success doesn’t necessarily come from breakthrough innovation but from flawless execution. A great strategy alone won’t win a game or a battle; the win comes from basic blocking and tackling.

I believe that entrepreneurs play an unmatched role and the accelerating pace of innovation is transforming the face of global challenges. You must think about the solution differently when you're trying to impact 1 billion people rather than affecting 1 million people.

The real metric of success isn't the size of your bank account. It's the number of lives in whom you might be able to make a positive difference.

The most frequently asked question I hear first-time entrepreneurs ask is, 'How do I know when to launch my product?' The answer, more often than not, should be: 'Now!'