So, first you go to your google reader, click the "options" button (a little gear on the top right corner) and choose "reader settings".
Next, open the "Goodies" folder and drag the button to your bookmarks bar. What this does is lead you trough all the unread blog posts on your list of subscriptions. The big advantage is that it really opens the blog so you see the original content and can comment all you want. Now, GO to your next blog!
For some extra fun (and some danger as well) add the "subscribe" button. Whenever you find another blog you want to follow just hit the subscribe button and that is it! Whatch your list of blog subscriptions grow exponentially... (this is the dangerous part).