Like marketing, publishing itself is a subject of all books, and there are many available on the subject. Check the resource section of your local bookstore, look for "self-publishing publishing" in your favorite search engine or Amazon, or go to your local library. If you plan to go this route, take the time to learn about it. The following are the absolute basics of what you need to know, do, or have as your own publisher:
Start with a good title and subtitle. You will need it every step. This is more difficult than it sounds, and it is important enough to hire an expert to guide you. There are two types of writers, in my opinion. One can change the title into a book, and the other can capture the essence of the book in a few pithy words. You need the last one. You can get the right guidance from the best self-publishing mentor to publish and advertise your book online.
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Ask the cover of your book designed by a graphic designer who specializes in the book. Go to your favorite bookstore and see the book cover. What caught your attention? What turns you off? What is boring? What feels good in your hand? Share your show with your book designer.
Write a marketing plan. It's never too early and you can always add it when you leave. In its simplest form, the marketing plan starts with the overall purpose for what you want to achieve, a strategy for how you plan to do it, and the specific tactics or actions you plan, with the target date and cost estimates.
Make a promotional brochure or brochure. Here is one time you will thank you when you enter your proposal because you will have all the information you need at your fingertips.