So, I spent some time last week retooling my book. Basically, I realized I needed to add some additional chapters. I've completed the list of chapters, each one a a waypoint leading to the next. No rewriting, just additional material.
I'm going to flesh out a description of each chapter before I get back to writing, and make sure my story has enough coherence.
Then I'll set the waypoints within the chapters and that should enable me to have a more consistent writing schedule.