Ok, just a simple tips from me on how to use this program.
Create you Google Account if you don't have one and log in to Google Reader.
(note : You can use your Blogger.com or Gmail account to login)
Copy a site feed from your favorite blog/website and paste into Add Subscription box. It would be something like this:-
Then, click add and Finish. That's all. Hehe..
You can manage your site feeds by putting them in a folder, rename or unsubscribe them if you want. Besides, you also can share and email your favorite posts with your friends.
It's really easy to find a feed url. You can find it through the orange icon or you can type it by yourself. If your friends is using Blogger.com, you can put it like this:-
(change blogname to your friend's blog name)
Finally, if you want to read some interesting blogs/websites, I'd like to recommend you this top list.
Related : Google Reader, Google Reader Blog