There's more than one way to do this. My 2 favorites are:
Add the declaration "page-break-before:always" to the css for the title of each story. For example:
If your story titles are enclosed in the h2 tag:
Code:
<h2>Title of Story</h2>
then on your stylesheet.css file add:
Code:
h2 {
page-break-before:always
}
Another way is to split each story into its own file:
In the toolbar find Edit --> Split at Cursor. After you place the cursor at the end of a story, split the file by clicking on "Split at Cursor". Do this for all of the stories. Each file will automatically start on a new page in your reader.
There are ways to use the find and replace to do this quicker but this is the basic way.