being proactive, curious, perseverance, courage...the list is pretty long. Best way is to start, and chances are you will be unrecognizable in a year's time.
Sales. Business means money. No matter how good your product is if you can't sell it, its a waste.
The world is full of shitty products marketed so well that they are overselling. And the world is full of examples of good products which are dead due to low/no sales.
Creative entrepreneurs are imaginative, which will help them to solve problems better. They know how to get the maximum out of a situation and keep their eyes open for the new opportunities. They are persistent and tenacious. In other words, they don't give up easily. Broad-minded entrepreneurs are always ready for action. They are not weighed down by their past failures and their ability to adapt to the changing situations is exceptional.
Risk tolerance. You have to be brave, but not stupid, to take risks.
It should be a calculated approach to risk management, but with the ability to bet something important and don't hesitate risking.
Risk aversion, on the other hand, is what keeps talented people away from taking risks and potentially becoming super successful in business.
P.S. I don't think that 100% of people should be entrepreneurs, but because your question was about entrepreneurial skills, I think Risk Management / Assessment / Tolerance is a must have (but not the only required skill)