The step to sharpen our thinking is to Challenging assumptions.
Challenging assumptions is developing our curiosity quotient. How do we practice curiosity? Start by asking Why? to things around. Why are we afraid of what we are afraid of?
Let me share my story. Long ago, I was afraid of the middle sex. When ever I saw them on the road coming towards me, my heart would pound. One day when I was with a good friend of mine, she noticed it and asked me. I told her. She asked me if I reasoned as to why I am afraid? I said no. The next week on a Saturday, she invited me to come to an NGO. I went. This was the NGO which was run by the middle sex for various social causes. She introduced me and told the gathering that I would be teaching them Fundamentals of Computers. With my inhibitions, I started to teach them. Over the next 2 months, everything changed for me. I got to know them better and I realized how wonderful and nice people they are. My fear was absolutely baseless. They loved me so much that after my sessions were over, they actually called me to come back few times.
Look around, start by asking simple questions. There are mostly no questions which have no answers. We just need to spend time with the question and we will get the answer.
If you are an Entrepreneur, ask yourself why you are solving the problem. If you work for a company ask why you are doing what you are doing.
Developing curiosity enhances your ability to challenge assumptions. When you challenge the assumptions, the way you look at dealing with things completely changes.