I am very interested in peoples processes. How do you start on an idea, how do you validate, what tools do you work with, what would you do to get your first cu

I am very interested in peoples processes. How do you start on an idea, how do you validate, what tools do you work with, what would you do to get your first customers, what would you change to get the ones after that etc It is really helpful to get an insight into how people think and work. If I find a moment later I will try and elaborate a bit more.