Page breaks

Does anyone know of any way of denoting where a page break would occur in the editor? I know of a way of inserting page breaks in HTML code using a <div> and some CSS, but that's noticeable only if one switches over to print preview in the browser. I need some way of notifying the user that they're nearing the end of the page and will be needing to insert a page break. Any help would be greatly appreciated.