There is good guide for Shopper Marketing fan. I am using them and it is a good app:
My social media collections
If you're interested in social media, this is my personal collections: https://www.pinterest.com/davidvu/ http://www.slideshare.net/davidvu007 https://vn.linkedin.com/in/vuthedu https://www.facebook.com/vuthedu https://www.youtube.com/user/vuthedu/featured and of course this blog: vuthedu.org