I am absolutely obsessed with the Underground New York Public Library blog.
It's basically just pictures of people reading books in the New York Underground/Subway, but there's something incredibly fascinating about matching the book to the person reading. I keep thinking "oh really" and writing down titles of books simply because the person reading looks interesting.
Or trying to guess where in the story they are in the books that I've read.
I know, I know... more reading, less staring at other people reading.