Another excellent tip to help with the promotion of your book, this one from Derek Haines over at justpublishingadvice.com
This particular tip is to help you select the best category to fit our book into. Amazon will reward top selling – not top writing – with more prominent opportunities, so how do you find the best category to slot in to?
How To Select The Best Amazon Book Categories For Your Book

Every author wants to publish an Amazon bestseller. But do you know how to choose Amazon book categories as part of book marketing?
Sure, you have your Author Central page and you promote your book on social media.
You might even understand keyword requirements and know about choosing Kindle search keywords.
But in learning how to sell on Amazon, you also need to know all about book categories on Amazon.