While I like an outline myself, there are many people who prefer to discover as they write. Does that mean they don't benefit from thinking about their novel in advance? Of course not!
Here's an interesting discussion about discovery writing (most of it is a podcast):
One thing they discuss is endings. Many discovery writers find that if they don't give some thought to the ending up front, things can drift away from them. They may also start and restart their story. Which may be fine, but it's good to know when to quit starting. (Also be sure and save your various drafts in November.)
While I like having an outline, my characters sometimes still surprise me.
Any insights, helpful tips that people want to share?----------