I always think out a problem as clearly as possible, and then act on it. My theory has always been to get started. The moment I get an idea I act upon it. If only people would act on more of their ideas, I am convinced they would lead more interesting lives.
Thomas Edison had great visions (for lights, music players, movies, etc. ) but he knew they didn't count until he could make them work. His statement that creativity is 99% perspiration makes that point. Consider how much time he spent trying to make a synthetic rubber material for tires and never stopped trying but he never succeeded.