For all bloggers, when typing or pasting long articles, you can organise them by categorising each topic/section/chapter as I have done in this post.
To see how to do this, simply browse through the contents above which is generated automatically.
IMPORTANT if editing with HTML editor: Please view the "Source" when editing by clicking the top left button in the editor and ensure the [page] code is at the very beginning or the first paragraph structure might break. This is flaw of the HTML editor unfortunately.
Add the following anywhere you wish to split into pages:
[page=SECTION TITLE] (where SECTION TITLE) should be replaced with the title you want to show in the contents table