This snippet, when added to your theme’s functions.php file, will allow you to append ‘… Read More’ or any other text to the end of your excerpts. Creates a more streamlined look.
<br /> function excerpt_readmore($more) {<br /> return '... <a href="'. get_permalink($post->ID) . '" class="readmore">' . 'Read More' . '</a>';<br /> }<br /> add_filter('excerpt_more', 'excerpt_readmore');<br />
Source: WPSnipp.com