How to fetch and show particular posts for a tag on home page in wordpress

Question

I am trying to fetch and show all posts in a featured listing style for tag my-guide

<?php if(have_posts()) : ?><?php while(have_posts()) : the_post(); ?>
    <div class="post" id="post-<?php the_ID(); ?>">
    <div class="thumbnail">
    <a href="<?php the_permalink(); ?>">
    <?php the_post_thumbnail(); ?>
    </a>
    </div>
    <?php endwhile; ?>
    <?php endif; ?>

This code fetch all featured image from posts, however I am trying to fetch it via particular tag, I tried this also but its not working for tag query_posts('tag=my-guide'); -

    <?php query_posts('tag=my-guide'); 
  while (have_posts()) : the_post();  
?>  
<div class="breaking">  
    <img src="<?php echo get_post_meta($post->ID, 'thumbnail',true) ?>" alt="Post Image" class="postimg" />  
    <h2><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>  
    <p class="datetime"><?php the_time('l, F j, Y G:i'); ?></p>  
    <?php the_content('Continue...'); ?>  
    <div class="postmeta">  
        <p><?php the_category(', '); ?> - <a href="<?php the_permalink() ?>#commenting" title="View Comments">  
    <span class="comm"><?php comments_number('0 Comments','1 Comment','% Comments'); ?></span></a></p>  
    </div><!--/postmeta-->  
</div><!--/breaking-->  
<?php endwhile; ?>  

Source of this -> http://net.tutsplus.com/tutorials/wordpress/build-a-featured-posts-section-for-wordpress/

Answer 1

I fixed the code on my own -

The problem with the second code block is that, no value is pouring in for this - $post->ID

So this method call is not doing any good in the code -

<?php echo get_post_meta($post->ID, 'thumbnail',true) ?>

To fix this, simply call, <?php the_post_thumbnail(); ?> <?php the_post_thumbnail(); ?> instead of <img src="<?php echo get_post_meta($post->ID, 'thumbnail',true) ?>" alt="Post Image" class="postimg" />

So this is the working code in general for a particular tag post display -

<?php query_posts('tag=your-tag'); ?>
    <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<div class="thumbnail">  
        <?php the_post_thumbnail(); ?>
        <h2><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>  
        <p class="datetime"><?php the_time('l, F j, Y G:i'); ?></p>  
        <?php the_content('Continue...'); ?>  
        <div class="postmeta">  
            <p><?php the_category(', '); ?> - <a href="<?php the_permalink() ?>#commenting" title="View Comments">  
        <span class="comm"><?php comments_number('0 Comments','1 Comment','% Comments'); ?></span></a></p>  
        </div>
    </div>  
<?php endwhile; endif; ?>