Just skimmed through all the posts so apologies if I double over what anyone else has said, but try not to stick to just one trainer and become devoted to following their exact steps. Find what works for your horse, take what you feel is right from a multitude of different trainers. Try and develop your own style- not everything works for every horse!
For something different, look up Klaus Ferdinand Hempfling and search working with horses at liberty. There is some truly amazing stuff to be found!