A more technical title than most, I would still like to recommend Aaron Shephard’s HTML Fixes for Kindle. I have reviewed this here on goodreads and there I make the point about file size. If you want to make more money from Amazon you need smaller ebook files. This can help streamline the HTML before you submit it to Amazon for publishing.
Aaron Shephard has a few of these kind of titles and from the evidence understand his topic. His blog is: Aaron Shephard’s Home Page and if you are at all HTML literate this might be something to consider. I do my final drafting in Word then export filtered HTML; this book tells you some of the things you can do with the HTML file before passing it on to Amazon. I don’t use the Scrivener kindle output module – this is something I should look into. I don’t know how relevant this is for that scenario – perhaps somebody can let me know?