There are many ways to plan your book or series - stickie notes, blackboard, legal pad, just hauling off and writing and hoping the characters will "speak" to you, the author, and then there are outlines.
As a pantser I don't do much outlining but I'm fascinated when I see samples of this technique, always hoping I can one day gear my pantser brain in that direction. The closest I've come is dividing up my book in Scrivener which I've been using since 2007.
I found it interesting to see these examples by some well known authors.
Are you a plotter or Pantser? Do you outline? On paper or on the computer?