I always find it helpful to look back at what I have learned in the past year, before I can look ahead. As I reflected this past week, I read some of my past blogs. I think most of what I learned I passed along to other writers.
However, I saw something interesting that you probably already know: if your goal is to sell books, plan to finish writing by June, use the next few months for critiquing/editing/cover design. And publish by October so that you can cash in on the biggest sales period of the year: Christmas.
Furthermore, it will help if you have the word Christmas or Holidays or other words “of the season” in your title. Beyond that, if your cover has a Christmas tree or snow on it, sales will increase.
Now, let’s say that you don’t want to write a Christmas story, per se. You can still have your book ready in October, design a cover with a winter scene, use a word in your title that might tend to be Googled, such as JOY or HOLIDAY. (I once saw a book that was about a place named Holiday Farms. It had nothing to do with Christmas. The last name of the individual was Holiday.)
You can use similar ideas for Easter, Fourth of July, Halloween, and so on. I leave you to your imagination and creativity in boosting your book sales around the holidays.