Harvard Business Review says that there are 9 things successful people do differently. What do you think is the main reason behind successful people?

I believe it's their continuous strive for knowledge and their ability to create a learning opportunity out of every situation they are in or every obstacle they face. As Voltaire puts it, “The more I read, the more I acquire, the more certain I am that I know nothing.”  

1. To know what you’re doing ,

2. To love what you’re doing,and

3. To believe in what you’re doing .

Unwavering determination and an ability to face rejection and criticism objectively, and then be all the better for it!

A love for knowledge and continuous learning. You have to believe that knowledge is infinite and that learning never ends. They both evolve and so should you. 

Being passionate about everything they do and giving it their all.

It's a combination of factors. But in general you need to be smart, cunning, and have a little bit of luck. Charisma and Good looks sometimes help, but they are not decisive qualities. 

Successful people are long distance runners, they have diligence and push forth when all others quite, in order to do something with great drive for a long time to succeed, you would mostly likely need to have a passion for it, a dash of talent also helps. 

There could be several reasons for every individual to be successful, some people are hungry for success because they were made to believe that they could not do it, some are successful because they had no option than to be successful but in most cases the zeal to make success a reality starts from competition. it could be competition with ones self or with a brother or a total stranger.

Determination, focus, research, ignore fear, dont accept defeat, improve your skill etc

Focusing and working hard on their goals with a positive attitude.