A few weeks ago, Buzzfeed posted J.K. Rowling's outline for Harry Potter and the Order of the Phoenix, and it further cemented my belief that she is a master of plotting. Let's take a closer look. (Click on the photo to see the original large image from at Buzzfeed.)
Warning: this post reveals plot points from book 5 of the series.
In other words, when writing her books, Rowling not only creates a general outline for the main plot, she identifies the important subplots and smaller elements that make up that larger plot and creates sub-outlines for each of them. This enviable ability to break a creative work down into its component parts is what makes her a Master of Plot.