I do not know just how others go about writing their novels, but in my case, wanting to write something in the line of Animal Farm (without the fictitious characters), and Zen and the Art of Motorcycle maintenance (only, hopefully, with More flow!), I find that I have to go about creating characters, situations and outcome with these ends in view.
Working at it like Mad, but all in the mind! The beginning and the middle part are well developed and written down, but the ending is the End of me (so to say! Haha).
Wish me Luck! Love and Regards to You all. 🙂