This is a nice one. Power up your search functionality by highlighting the search term in the results.
Open search.php and find the the_title() function
Replace with:

 
echo $title; 

Above the modified line add:

 
<?php 
<span style="white-space: pre;"> </span>$title <span style="white-space: pre;"> </span>= get_the_title(); 
<span style="white-space: pre;"> </span>$keys= explode(" ",$s); 
<span style="white-space: pre;"> </span>$title <span style="white-space: pre;"> </span>= preg_replace('/('.implode('|', $keys) .')/iu',
<span style="white-space: pre;"> </span>'<strong class="search-excerpt">\0</strong>',
<span style="white-space: pre;"> </span>$title); 
?> 

Add the following to your style.css. Add:

 
strong.search-excerpt { background: yellow; }