[Jellby]

Originally Posted by canpolat

.page-break {
visibility:hidden;
page-break-before:always
}

"visibility" is not a required property in the ePub spec. I use simply an empty <div>:

<div class="pagebreak" />
<h1>My Title</h1>

div.pagebreak {
  height: 0;
  margin: 0;
  padding: 0;
  page-break-before: always;
}

(or <div class="pagebreak">&nbsp;</div> if the reader doesn't like empty elements).

Another solution is using padding instead of margin for the <h1> (if you don't have background or borders): unlike margin, padding is not discarded after a forced pagebreak.