I can't count how many times I've heard someone say, 'writers have a god complex'. So the question we must ask ourselves is, do we? We must take a good hard look at our writing to see if we're directing the characters where we want them to go or if we're allowing them to take the path their personalities would actually take. This is harder than it sounds. I came to the end of a trilogy and had a problem deciding how to end it. Would this character of mine die or wouldn't she? The question wasn't really could I do that to her, but would she do that to herself? It took me a while to figure that out. She had to decide, not me.
Once I figured this out it was actually kind of liberating. I then realized I didn't have to think quite so hard on how to guide the story, it kind of guided itself. Of course we as writers still have to lay the foundation but once you create your characters, give them a bit of rein and they will propell the story into something great.