You can use JavaScript to automatically open print dialogue box so that users can print the page. Although most users know they can do something like File > Print, a Print this page option can be nice, and may even encourage users to print the page. Also, this code can be triggered automatically upon loading a printer friendly version.

The following code creates a hyperlink and uses the JavaScript print function to print the current page:

<a href=""JavaScript:window.print();">Print" this page</a>

To automatically open the print dialogue box, copy and paste the following code after the </body> tag:

<script type="text/javascript">
<!--
    window.print();
//-->
</script>