How about some excellent insight into what it takes for the pros on both sides of the glass to produce the best of the best.  I just feel this article is fantastic. It’s all about the marriage of voice performance with technical aspects. Hope you’ll agree that a finished voice-over piece is not about “easy talking”.

http://www.sonicscoop.com/2012/01/22/the-art-of-vo-production-pomann-sound-breaks-it-down-step-by-step/