1. Log in to your dashboard--> Design- -> Edit HTML

2. Click on "Expand Widget Templates"

3. Search "Ctrl+F" and find the following code:

<b:if cond='data:post.title'>
<h2 class='art-postheader'>

4. Now paste the next code after the upper code:

<div style='float:right; margin-right:10px;'>

<script type="text/javascript">
tweetmeme_screen_name = 'ArtisTutorials';
</script>
<script type="text/javascript" src="http://tweetmeme.com/i/scripts/follow.js"></script>

</div>

5. Replace ArtisTutorials with your Twitter username and save the template.