Up until that moment, you were captivated - you were completely engrossed in the story. But this discrepancy just yanked you right out of the narration and plopped you back in your living room.

The longer a work, the more important planning ahead becomes. Because of the length of time required to write longer works, it's easy to forget what happened in Chapter 3 two weeks (or months) later while you're writing Chapter 17. Even if you catch the error in the edit phase, the problem might permeate the entire piece. Take for instance the previous sword example. The hero now needs to find another way through the thicket, or else the author needs to remove the thicket from the plot entirely. But what if the thicket is central to the plot, such as it is in the story of Sleeping Beauty? In that case, the hero needs to either find another sword, or not lose his sword in the first place. Fixing errors such as these in the edit phase is frustrating, because every correction can ripple, yielding new and unforeseen problems.

Prevention is the best method for avoiding mistakes in your story plot. Outlining in advance prevents the errors in the first place. Draft a rough outline before you begin writing the piece. When starting a new writing project, you may not know everything that's going to happen in your story, and that's okay. Your initial outline can be limited to your beginning, your climax, and your ending. Once you have that in writing, you can begin to flesh out the middle, outlining how your characters will get from the beginning to the climax, and finally, to the end.

Some writers feel that outlining stifles creativity. While opinions vary, two things remain true: (1) plot errors take a lot of work to fix after the fact, and (2) overlooked plot errors run the risk of pulling readers out of your story. Whatever your thoughts on outlining and the creative process, consider the headaches that planning ahead will save you. You may find that it's worth it.