From a lecture Kurt Vonnegut gave in NYC in 2005 called, “Here is a lesson in creative writing.” (via my brother):

Now let me give you a marketing tip. The people who can afford to buy books and magazines and go to the movies don’t like to hear about people who are poor or sick, so start your story up here [indicates top of the G-I axis]. You will see this story over and over again. People love it, and it is not copyrighted. The story is “Man in Hole,” but the story needn’t be about a man or a hole. It’s: somebody gets into trouble, gets out of it again [draws line A]. It is not accidental that the line ends up higher than where it began. This is encouraging to readers.