When I first have an idea for a new book, I begin by creating what I call a 'Mastersheet'. This document serves as the outline as well as the place for potential titles, subtitles, book covers, and any other additional miscellaneous information. I edit this document regularly throughout my writing process. As I write (or even create a document for) each chapter, I hyperlink it on the Mastersheet so that I could easily access it. I also create a folder in my Google Drive for each book.

Here is an example of a Mastersheet for a book I wrote:

PRESUMED GUILTY

How DC politicians destroyed due process — and how we can restore it

Chapter 1: What Is Due Process? Good to go! (3,012 words)

Chapter 2: It Starts With A Warrant Reviewed by Kate (2,346 words)

Chapter 3: Tyrannical Asset Forfeiture In progress (1,809 words)

Chapter 4: Broad Surveillance Not yet started

Chapter 5: Traffic Law Not yet started

Chapter 6: Bail & Pre-Trial Conditions First draft complete (3,700 words)

Chapter 7: Checkpoints Good to go! (1,883 words) 

Chapter 8: Eminent Domain Good to go! (1,300 words) 

Chapter 9: Crazy People Good to go! (2,541 words) 

Chapter 10: FISA and the No-Fly List Good to go! (1,832 words) 

Chapter 11: Prosecutorial Malfeasance Good to go! (2,872 words) 

Chapter 12: Judges Gone Wild Good to go! (2,500 words) 

Chapter 13: Felony Murder Good to go! (2,307 words) 

Chapter 14: Irreversible Mistakes Good to go! (3,244 words) 

Chapter 15: But It's An Emergency! Good to go! (2,676 words) 

Chapter 16: Police Brutality & Misconduct Good to go! (2,000 words) 

Chapter 17: Incorrections  Good to go! (1,595 words) 

Add:

Legalized Kidnap

Undue Vagueness - Three Felonies A Day - Silvergate says this violates due process

Think of the Children!

Public Defenders Inside New Orleans public defenders' decision to refuse felony cases 

Court Fees and Getting Court Fees Paid | LawHelp.org

(dozens more links/things to add to the next edition of the book)