Added to the codex on the pages page.
I think I may have found something, in wp-content/themes/themename/sidebar.php find the string
<?php wp_list_pages("title_li=<h2>" . __("Pages") . "</h2>"); ?>
or similar.
After the </h2> add &exclude=idnum.
So you have something like
<?php wp_list_pages('title_li=<h2>' . __('Pages') . '</h2>&exclude=38' ); ?>
This will hide the page of that ID number. If there’s an easier way, I’d like to know about it.
