Feedburner is one the best services for blogger, which I came to know after using Feedburner for my blog from last one year, I realized that why I did not use this service in the beginning of blogging, if I did, then probably I would have been some where else, so that's why I recommend each and every blogger to use Feed burner, that's why even I have started writing series of blog post for only Feedburner.
Here is that series of blog post- Complete Guide of Feedburner for Bloggers.
Actually this is a not easy task to add Add Feedburner Subscription Widget to Blogger, but I am giving the easy way to add it.
But you must know your extension feed url, like mine one as I have given read color in the just below given code.
Just copy this code-
<form style="border:1px solid #ccc;padding:3px;text-align:center;" action="http://feedburner.google.com/fb/a/mailverify" method="post" target="popupwindow" onsubmit="window.open('http://feedburner.google.com/fb/a/mailverify?uri=your feed url', 'popupwindow', 'scrollbars=yes,width=550,height=520');return true"><p>Enter your email address:</p><p><input type="text" style="width:140px" name="email"/></p><input type="hidden" value="Rehut-indiasFirstProfessionalPortalForStudents" name="uri"/><input type="hidden" name="loc" value="en_US"/><input type="submit" value="Subscribe" /><p>Delivered by <a href="http://feedburner.google.com" target="_blank">FeedBurner</a></p></form>
You can just copy this code and then go to blogger.com
Because I am checking it, whether it is working or not.
About Feed Burner Widget-
I know it took your some time, but I know even this time is your investment, it will give you a great platform later.
If you have any problem about adding Feedburner widget then feel free ask question by giving comments below.