on Fiction University:
If you have trouble plotting an entire novel at once, try plotting it one small arc at a time.
Trying to keep an entire novel in your head can be challenging for some writers. Trying to plot out an entire novel before you write it can be challenging for other writers. But there’s a middle ground that lets you plot out smaller chunks of the story as you write it—sort of a pantsing outline.
Plotting and writing with mini arcs.
An entire book can be overwhelming to plot—especially if you’re not sure what happens. But mini arcs are more manageable and allow you to work with the immediate scenes and problems without worrying about what comes next and trying to force the plot to head in that direction.