Some bloggers post a tremendous amount. (I don't know when they sleep!) However, since Reader allows me to view just the titles on my iGoogle homepage, I can quickly delete material that doesn't interest me. Or if I choose to view items on my Google Reader homepage, I can quickly scroll through my folders in the left sidebar. Since the blogs with recent posts appear in bold. I can click on them to see the entire posts on the right.
Keeping my Google Reader manageable requires some "gardening skills." Once in a while, I remember to "weed" my garden of feeds by going to the Reader page and clicking Trends. That way I can see which subscriptions are less useful by clicking on Inactive or Most Obscure under Subscription Trends and deleting those feeds.
Wow! I think I need to do that now!