Add Share button on each post

1. Dashboard >> Template >> Edit HTML >> Expand Widget Template
2. Search For [ CTRL + F ] : 


<div class='post-body entry-content'> 
or
 data:post.body


3. Right above that code, paste the following code :

<div style='float:right;padding:4px;'>
<a expr:share_url='data:post.url' name='fb_share' rel='nofollow'
type='button_count'/>  
<script src='http://static.ak.fbcdn.net/connect.php/js/FB.Share'
type='text/javascript'/>
</div>

4. Save Template
*preview before save*


Do note if you put share button on every post your Facebook like box as in Add floating like box will never work and it will not shown in the floating box.