"Four qualities of Facebook’s most-shared stories of 2011:
    1. The stories are useful, amazing or opinionated. Not much hard news or traditional politics here.
    2. Nearly all feature a short, grabby headline that explains the story well.
    3. Most stories are targeted more to women than men. 13 are about kids and/or parenting. Relationships, animals and astrology also have a strong showing.
    4. All stories are from major news organizations with good-sized FB pages (reach matters)"