Drupal 6

Some examples:

<?php print $title; ?>

<a href="<?php print $node_url ?>"><?php print $title; ?></a>

<?php if (!empty($field_news_image)) {
  print $field_news_image['0']['view'];
} ?>

<\div class="submitted">
    <?php print format_date($node->created, 'custom', 'j F Y'); ?>
</div>

<\div class="field venue">
    <?php print l(($node->field_venue[0]['value']), $node->field_venue_url[0]['value']); ?>
</div>

<\div class="field btn-tickets ticket-link">
  <?php 
    if($node->field_sold_out[0]['Yes']){
      print t('Sold out'); } 
    else {
      print l(t('Tickets'), $node->field_ticket_sales_url[0]['value'], array('class' => 'buy-tickets')); }  
  ?>
</div><?php print $title; ?>

<a href="<?php print $node_url ?>"><?php print $title; ?></a>

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Print the complete CCK Link field:

<?php print $node->field_listing_website[0]['view'] ?>

Or separate the URL from the title:

<?php 
    $link_url = $node->field_link[0]['url'];
    $link_title = $node->field_link[0]['title'];
?>

<div<?php print $node_attributes; ?>>
  <?php if (!empty($link_url)) : ?>
    <a href="<?php print ($link_url); ?>">
  <?php endif; ?>




      <\h2 class="node-title"><?php print $title; ?><\/h2>
    <?php print $content; ?>
  



  <?php if (!empty($link_url)) : ?>
    </a>
  <?php endif; ?>
</div>

This is also explained pretty well here: http://www.caucusllc.com/blog/theming-a-cck-node