I have been reading books recently and I have discovered that the major challenge writers face is formatting issues. When you are writing a book or article, consider the following;
Page break; Add page breaks to your chapters to improve the readability.
Paragraph indentation; Indent your paragraphs so that it will be visible to readers.
Layout; Use a good layout so that your book size won't be too small or too big.
Clickable table of contents: Add CTC so as to improve your content navigation.
Lastly, format your headings.
These are the few that I can remember. You can add yours.
This BLOG POST explained everything about formatting in detail ...