Include a no frames alternative and use meaningful filenames.

A link to a frameless alternative could be coded like this:

<FRAMESET cols="10%, 90%" title="Our departmental Web site.">
      <FRAME src="nav.html" title="Navigation bar">

      <FRAME src="doc.html" title="Documents">

      <NOFRAMES>

      <A href="lib.html" title="Department link">Jump to a "no frames" version of this site.</A>

      </NOFRAMES>
</FRAMESET>