Here is a collection of resources that I have found on early returned missionaries. The ones that I found most helpful are marked with an *.
Articles and Individual Blog Posts
Deseret News: Many Mormon missionaries who return home early feel some failure
LDS Media Talk: When Missionaries Come Home Early
When A Missionary Returns Early
Salt Lake Tribune: Guilt, pain, help and hope — when Mormon missionaries come home early
Returning Home Early*
Websites and Blogs
Early Returned Missionary Initiative*
Like a Broken Vessel by Elder Holland
Recommended by Others
Have one that you like? Send it in!