I think longingly of the past. My short stories, essays, columns, poems were easily gathered in file folders. Even multiple revisions or printed pages from feedback could be compiled into easy revision lists. I spent a year working on new stories and all 45 of them (still in process) are in one woven shelf basket in my writing room.
A book is another animal altogether.
How do you handle, sort, file, and save all the necessary bits and pieces of a book, including your ideas, your research, your images, and your drafts?