You didn’t touch on the importance of selling your books off Amazon, too. Putting all your eggs into the Amazon basket will get you a Amazon best seller tag but you won’t reach readers on Apple, Barnes & Noble, Google, or Kobo (which is the bigger in Canada than Amazon). Library sales are important too as are paperbacks and audiobooks. You should take a look at Wide for the Win on Facebook or 20BooksTo50k. They both have a wealth of info on how to move your backlist.