Not everyone uses a feed reader like Bloglines to read blogs. I like putting Feedblitz on my blogs because it allows people to subscribe by email. (See the box in the right hand corner of this blog that says "Enter your email to subscribe"?) The version of Feedblitz's services that I use are free. All you have to do is set up an account and it will give you a piece of HTML code (don't get scared) to put in your blog's template. Copy the code and click on the "Template" tab in your Blogger account. You will see a page with lots of words and symbols on it. Scroll down until you see where it says:
End # main
Paste you Feedblitz code below this.
Now click on Preview to make sure everything looks OK. If it doesn't look right, hit "clear edits" and start again. If it looks normal hit, "Save template changes." As long as you always preview and clear edits if things look funky, you can't really hurt your blog.
P.S. You don't have to put your Feedblitz box there, I just like it there because it easy to see.