Add next/previous post links on Single Posts.

wordpress_next_previous_post_links.php

<?php

/* Add next/previous post links on single posts
----------------------------------------------------------------------------------------*/
add_action( 'genesis_before_comments', 'ag_prev_next_post_nav' );
function ag_prev_next_post_nav() {
	if ( is_singular( 'post' ) ) {
		echo '<div class="prev-next-navigation">';
			echo '<div class="wrap no-padding-vertical">';
				echo '<div class="one-half first true align-right">';
					previous_post_link( '<div class="previous"><span class="caps pre-title">Previous Post</span> %link</div>', '%title' );
				echo '</div>';
				echo '<div class="one-half true">';
					next_post_link( '<div class="next"><span class="caps pre-title">Next Post</span> %link</div>', '%title' );
				echo '</div>';
			echo '</div>';
		echo '</div>';
	}
}