WordPress have a code that allows you gives “next / back” links at the bottom of the article. very useful if you have a very long page.
<!–nextpage–>
Did you know you could split a single post up into different web pages by just typing <!–nextpage–> in your post? Called the Page-Link tag, place your cursor in the spot where you want a page break to appear in your post and type <!–nextpage–> (you need to use the text mode of the editor to do so). This technique can be used throughout a long post to make two or more pages out of a single post. Note: At one time there was a Next-Page quicktag button but it was deleted to reduce the clutter on the quicktag bar
http://codex.wordpress.org/Styling_Page-Links
