Writing’s funny. You can write up pages in one day and realize they don’t get the right feel for the scenario you’re trying to portray. I have notebooks full of writing I never use. But that’s okay. That’s part of the process. Yes, it’s frustrating to realize your breakthrough is the same thing you written fifty pages earlier, or realize there’s a question of chronological actions and reactions along the story’s path, but that’s part of the writing process. An author is recognized by his failures just as much as his successes, but as long as you keep writing, something good will come out of the mess.