First, the Barack Obama campaign is now posting square pictures on Facebook, making them perfect for screen grabbing and posting on Instagram. This one is very well done.
(I've now realised that lots of brands post square pics on Facebook, but I hadn't noticed it done so well before)
Second, brands are trying to create photo opportunities for people to take pics to share. I saw this one in Leicester Square a couple of months ago.
Seen any other good examples of people making it easier to share?