Add Like Under Post

1. Go to Blogger Dashboard > Your Blog > Template > Edit HTML

2. Backup your template.

3. Check the box of expand widget template.

4. Search for <data:post.body/>.

5. Now if you want to add the plugin at the end of posts, then add the following code below <data:post.body/>. If you want to add the plugin just below post titles, then add the below code before <data:post.body/>.
if u want click to like ur page:

<div id="fb-root"></div><script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script><fb:like href="" send="true" layout="button_count" width="450" show_faces="false" font=""></fb:like>

if u want click to like ur Post:
   <iframe allowTransparency='true' expr:src='&quot;http://www.facebook.com/plugins/like.php?href=&quot; + data:post.url + &quot;&amp;layout=standard&amp;show_faces=false&amp;width=100&amp;action=like&amp;font=arial&amp;colorscheme=light&quot;' frameborder='0' scrolling='no' style='border:none; overflow:hidden; width:450px; height:40px;'/>

6. Now save your template and you're done !
 Don't forget say Thank :) by Alex