Widgetizing a theme…

I am not sure how to go about getting this sidebar widget ready… could someone help? https://www.heggoodtree.com

<div class="box">
<h2>Categories</h2>

<?php //list_cats(0, '', 'name', 'asc', '', 1, 0, 0, 1, 1, 1, 0,'','','','',''); wp_list_cats( 'hierarchical=1' ); ?>

</div> <div class="box"> <h2>Last Entries</h2>

<?php wp_get_archives('type=postbypost&limit=12'); ?>

</div> <div class="box"> <h2>Archive</h2>

<?php get_archives('monthly', '', 'html', '', ''); ?>

</div> <div class="box"> <h2>Meta</h2>

<?php wp_register(); ?>
• <?php wp_loginout(); ?>
• "><?php _e('Valid <abbr title="eXtensible HyperText Markup Language">XHTML</abbr>'); ?>
• <abbr title="XHTML Friends Network">XFN</abbr>
<?php wp_meta(); ?>

</div> <div class="box">

<?php get_links_list(); ?>

</div>