Great advise and a person should be more observant and questioning, although this can still be lacking since you might end up with very "surface" ideas, to make it truly become something a bit more "insightful" a person needs to make connections that you have not made before, thinking about a topic you discovered with a lot of focus can lead to you missing other connections that can enhance your work, so I think mulling it over just keeping it at the back of you mind for a bit will help your thinking, to enhance the story since your mind will have the opportunity to explore all possibilities making seemingly unrelated connections due to diffuse thinking.