I may just be figuring something out that is old news for the rest of you....but I'll share anyway. I use Google Reader to keep up with everything and I just clicked on "trends" in the top left hand corner of the Google Reader home page. Here's what it told me:
From your 248 subscriptions, over the last 30 days you read 2,243 items, starred 12 items, shared 0 items, and emailed 0 items.
Whoa. No wonder I feel overwhelmed sometimes. It also has some handy dandy graphs and stats, but they're not quite accurate, but it was still fun to browse through.