Wouldn't it be nice if there was a way to freeze a copy of your mental state at the end of the book, then reboot back to that saved copy when the time came round for revisions?

I don't know how mizkit, matociquala and other prolific authors manage to jump from one project to another as they go from writing new material to revising previously submitted manuscripts, to final copyedits on even older projects. I'm more single-threaded myself--not sure I could keep all those balls in the air.