function new_excerpt_more($more) {
global $post;
return '… <a class="read_more" href="'. get_permalink($post->ID) . '">' . 'Read More!' . '</a>';
}
add_filter('excerpt_more', 'new_excerpt_more');
function my_excerpt_length($length) {
return 30; // Or whatever you want the length to be.
}
add_filter('excerpt_length', 'my_excerpt_length');