I've flirted with the idea of becoming a Certified Fly Caster many times. It really wouldn't do anything for me professionally. I guess I just want to confirm I do know what I'm doing. After watching this video I know for sure I couldn't pass it. At least not with my casting skills currently. The video has some great info but the part I found the most beneficial goes over tailing loops. I get tailing loops from time to time. I can usually correct them on the spot and I've always wondered what exactly causes them. This movie explains it really well.
FFF Casting Instructor, Casting Demonstration 1 from Silver Creek Outfitters on Vimeo.