For my first two novels (working on second drafts for both), I started with a general idea of the main conflict and then let the plot develop as I went along the way. As I got towards the end I spent more time outside of writing thinking about how to wrap it all up, based on what I'd written and what would make sense. How do you all go about it? Do you make a general outline before starting to write? Or do you just 'let it flow' and then clean it all up during revisions?