If you're finding it hard to keep up with everyone's blogs I really recommend:
You input all your favourite blogs and it lists them on a page so you can just click the link and read the blog. When you've read the most recent entry you simply click the "Mark All as Read" button. The next time you login you'll be shown all the blogs that have published new posts since you last logged in so you don't have to finish a blog several times a week to see if they've updated or not - because Google Reader will tell you at a glance!
The only thing you can't do in Google Reader (as far as I know) is comment and read comments but, if you want to comment, you just click on the title of the post and it'll open in a new window so you can comment.