Get the small cute twitter button and add it anywhere in your blogger either at header,inside the post or sidebar.
1.Login to blogger->> Page elements or Layout->> Add a gadget->>Html/java script.
2.Add the below code in the Html/java script box and pace the gadget at your favourite loacatin to add it.
<a href="http://twitter.com/modifymyblogs" class="twitter-follow-button">Follow @modifymyblogs</a>
<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>
4.Save gadget and you are done.