You can use the get_page_by_title function as described by the codex here http://codex.wordpress.org/Function_Reference/get_page_by_title. Here is an example of getting the title of a post. By default, it’s looking for a post type of ‘page’:
$current_post = get_page_by_title("certain title", OBJECT, "post");
echo "<a href="" . $current_post->guid . "">{$current_post->post_title}</a>";