Curiosity is a part of human nature. We like to ask questions and we love to seek answers. This is a healthy activity and it is essential for any kind of learning. But sometimes we need to make decisions. Sometimes we need to make choices. Sometimes we need to do something immediately and urgently but our mind does not let us do our work. It starts asking questions like why are you going to do it? What is there for you in it? What will you get from it? Will you really succeed in it? Isn't it a waste of time? Shouldn't you do something else? Isn't it a waste of time? Cannot you make a better decision? Isn't the reward of doing it uncertain? What if you fail? You are getting negative feelings before doing it, so shouldn't you quit to avoid this negative feeling? So your mind does not stop and it goes on and on till you keep on listening to it. The endless questioning and answering does not stop and the time passes quickly. You cannot make a decision. You cannot make a choice. You cannot do even a small task which could be done in 30 minutes but due to excessive questioning of your mind you cannot get it done even in 5 hours. This is almost common to everybody except few of us. I used to suffer this problem when I was doing my M.Sc. Economics. Then one day I came up with a solution. I purchased a good notebook and I named it as a TARGET BOOK. I don't really know that why I called a target book but it helped me alot. It was actually a COMMAND BOOK for me. Whenever I wanted to do something I just gave myself a written command by writing it in the target book. For example: Read 30 pages of monetary economics from 10:00 AM to 11:00 AM. Now all my concentration and focus was given to that command. I just stopped my mind to ask questions. So I did not wasted time in questioning and answering about what is going to happen and what is not going to happen. So I got rid of a chain of useless questions. It made me successful in my Masters in Economics and my target book still helps me. So solution for an excessively questioning mind is to write commands for yourself and just focus and concentrate on that very command and just stop listening to your mind till you execute your command and till you finish your task. One day I read a slogan on a NIKE shirt. It was "JUST DO IT" it further inspired me to do things without much thinking. And it also gave me the impression that so many people face this problem in their daily lives so it was just a good idea to remind themselves that don't think excessively JUST DO IT! I hope this will help you like it helped me always! Thinking deep is also a very nice activity but everything should be done at it’s proper time! Thank YOU and Have a Good Day!