There are things the story must have or else look incomplete. And these will almost automatically present themselves. When they don't, you are in trouble and then the novel stops.
Chinua AchebeMosquito [...] had asked Ear to marry him, whereupon Ear fell on the floor in uncontrollable laughter. "How much longer do you think you will live?" she asked. "You are already a skeleton." Mosquito went away humiliated, and any time he passed her way he told Ear that he was still alive.
Chinua AchebeWe don't want to be simply wandering about without some kind of reason, we want our presence here to have a purpose, and that we are not going to end here, we are going to proceed somewhere else, and also that we didn't begin here, that we began somewhere else and all that living, all that elaborate account of our presence seems to be quite basic to our nature and so this is what literacy taps into.
Chinua AchebeWhen I'm writing, I really want to satisfy myself. I've got a story that I am working on and struggling with, and I want to tell it the most effective way I can. That's really what I struggle with. And the thought of who may be reading it may be there somewhere in the back of my mind - I'll never say it's not there because I don't know - but it's not really what I'm thinking about.
Chinua Achebe