Part 1: https://msdn.microsoft.com/en-us/library/hh323697(v=vs.100).aspx
Part 2: https://msdn.microsoft.com/en-us/library/hh323713(v=vs.100).aspx
Optimizing performance of your WCF Services: http://www.codetails.com/2012/10/30/optimizing-performance-of-your-wcf-services/