Wordpress Mullet Loop: Place this loop in the index.php. Gives the option to pull in a custom content template for the most recent blog post in the blog feed e.g. Show full blog post for most recent post while only showing excerpts for older posts.

mullet-loop.php

<?php if (have_posts()) : ?>
    <?php $count = 0; ?>
		<?php while (have_posts()) : the_post(); ?>
		<?php $count++; ?>
	<!-- Check for the first blog post in the loop && makes sure it the first page of results && makes sure it is the blog -->	
	<?php if ($count == 1 && $paged == 0 && is_home()) : ?>

		<!-- Most recent blog post with custom template will display above older entries - Requires a content-featured.php or whatever you want to name your file or replace with code -->
		<?php get_template_part( 'content', 'featured' ); ?>

	<?php else : ?>

		<!-- This will loop through the rest of the blog posts - Requires a content.php or replace with code -->
		<?php get_template_part( 'content' ); ?>
		
	<?php endif; ?>
	<?php endwhile; ?>					
<?php else : ?>

	<!-- Content that will display if no posts are available - Requires a content-none.php or replace with code -->
	<?php get_template_part( 'content', 'none' ); ?>

<?php endif; ?>