A good title is your book's first marketing tool.
A catchy, "selling" book title sometimes erupts spontaneously from the mind of the author, the editor or from someone in the publisher's marketing or sales department. More often, however, writing a book title--like everything else about thoughtfully publishing a book--involves work.
For the book publishing- and food-loving biopic Julie and Julia, about the best-selling cookbook author Julia Child, screenwriter and director Nora Ephron wrote a wonderful scene about writing a book title involving a lot of brainstorming and then an "Aha!" moment. Save for the invention of word processing, the scene rings true as one method by which book editors and authors think up their book titles.
If you're in the process of titling a book, following is a bit more structured method to help get your creative — and marketing — juices flowing.