Writing

So at this point I continue to work on my book. I'm not sure however that I'm going about it properly. I wish I knew how other authors went about things and what there order is. I am reading books still on plot, structure, writing fiction, etc. It seems to be helpful but it still frustrates me because I want to write the best book possible. I need to get published; it is not even a question. How did J.K. Rowling do it? How did Nora Roberts? What about Tolkien? Has it gotten harder yet to get published, was it easier five years or ten years ago? I guess the only option is to keep on writing and try to get it published.