A Quick Guide to Organizing Your Fantasy/Sci-Fi Novel
I'm going to try and briefly cover World Building specifically for Fantasy and Science Fiction (though it will apply in general to any setting), both major and minor Characters, and some basics of Timeline here. I am not going to walk you step by step through how to write your own story, but you should (hopefully) get some useful tips out of this.
I never used to organize my novels before I started writing. I have so many stories in my head, I would just pick one and start writing. I didn't have trouble keeping to the same details of a given character because I knew them so well. But after taking such a long break from writing Missing Puzzle Pieces, I really needed to do some serious work. I don't remember all the details I had in my head back when I started... in fact, I've completely forgotten the original ending. For those of you who don't know my story, which starts