A popular theory
Some people will tell you that having work in anthologies increases your exposure - this is true. Other people expound the theory this exposure increases your chances of selling - this may be true - but it never helped my books sell.
The Peacock Writers
I am proud to be a member of this charity writers group http://hereiamattheedge.blogspot.co.uk/p/the-peacock-writers.html#.VerZJCgViko Twice a year we bring out a paperback for children's charities.
Two and a half years ago, I was asked by a group of indie writers to write for the charity book Angels Cried. Our aim was to help the survivors of the Sandy Hook massacre in some small way. This book was number 1 in the children's section of Amazon for several weeks that Christmas.
Prior to Angels Cried I had work put in a book sold at Comicon 2012. The book was published by Indie Book Lounge; despite having work in this book it took me a year to track it down on Amazon. The editor Alan Schneider stopped contact as soon as I requested some copies.
Later in 2012 I entered a writing contest on Facebook, at the time two fellow writers put forward the idea of a joint project. By the end of the contest, the project was forgotten, they came second and third in the contest - I was pushed to fourth. They got work offers, and I was left in the cold feeling what was the point in going on?
None of these anthologies helped me in the slightest. The best help I got was from my friends Jesamine James, Paula Shene, Catherine Lenderi, and a few others in the Facebook group The Booktrap during October 2014.
It was Jes's relentless Tweeting which helped my series http://hereiamattheedge.blogspot.co.uk/2015/04/forgestriker-collection.html#.VerdnSgViko become the great success it has been over the last 18 months.