Sajed Ahmed

This plugin is used for add a custom column field to post screen like post title,post category etc.This plugin is create a new column 
named “Featured Image” and the content is the particular post’s feature image which is uploaded by the wp-admin Post page.When this plugin activated you will see the Featured Image box at bottom right side of Add New Post page and also you’ll see the new “Featured Image” 
column on the manage Posts screen.

Wp-ImageColumn

Add featured image Column to the WP Posts Screen

gapgag55

When you have a new post. you are lazy upload Feature Image. if you download and activate this plugin. you will be happy. Because this plugin will get your image in your post to show your post on your website
you should copy this code to your position code of thumbnails
<pre><code><?php echo do_shortcode('[thumbnails]'); ?>
</code></pre>
if you want to set about width and height
<pre><code><?php echo do_shortcode('[thumbnails width="100" height="100"]'); ?>
</code></pre>

Auto Thumbnails

Auto Thumbnails will help you upload Feature Image.

Wp-ImageColumn vs Auto Thumbnails