Lucky for all you Blogger users, you guys already have RSS feed. All you have to do is link to it for your visitors to subscribe. You have two options for that:

1. Go to Blogger - Dashboard - Layout, and press Add Gadget. You would be able to browse Gadgets menu and what you need is find Subscription Links. This is a pretty simple way of adding RSS feed links to your blog.

2. Other way to do it is by linking directly to your RSS URL. That is fairly simple. To link to your posts RSS feed, type /feeds/posts/default after your blog url. To link to your comments, type /feeds/comments/default

E.G.

http://your_blog.blogspot.com/feeds/posts/default

http://your_blog.blogspot.com/feeds/comments/default