For a long while I've wondered just how much of my time is wasted sifting through uninteresting feed items. Although Google Reader provides almost no way to measure such things, their "Trends" view does list how many items were aggregated in the past 30 days, together with how many items I've "starred".

Thus, for every item I now read, I also star anything that I find interesting. Starting in January I'll have some idea just how many of my feed items are uninteresting.