Surely there's a sorting metric that could solve this? Something like score = k_1/age_of_post * k_2/frequency_of_posts with appropriate k-weights. Personally,

Surely there's a sorting metric that could solve this? Something like score = k_1/age_of_post * k_2/frequency_of_posts with appropriate k-weights. Personally, my Google Reader has a folder for 'rarely updated', which I usually check first. Then I have the 'All Items' sorted by magic and skim the first few pages or so for things that strike me as interesting. Then I mark all as read.