Because of my recently acquired eighteen-month-old filly, I've done plenty of surfing, Googling up various horse-training methods online. RFD TV has lots of helpful shows I watch from time to time, too. I've picked up a few basic things that seem to work well with Libby.
I keep in mind that a little knowledge can be a dangerous thing; I pray hard when I'm working with my adolescent horse that I won't do anything to mess over her mind (and of course that I don't get hurt).
What I've been using most is the Parelli Seven Games; Libby already seemed well versed in games #1 and #2 when I got her, but I reinforce those constantly, and am working on #3.
This morning I turned on the TV early, and there was Monty Roberts, the famous "horse whisperer", who has even trained horses for Queen Elizabeth II.
It didn't take a lot of web surfing to find out that his family has written a book refuting the things he's said about his cruel daddy and his mousy, subservient mom. I've been skimming over the book, which can be read on-line for free if you sign in and make a password. I'd say there are a lot of inconsistencies in Monty's stories.
I think I'll stick with Pat Parelli.
(Added later) I should have mentioned that nobody really has any objections to Monty's methods with horses; it's just that he tells so many lies about his past, especially about his father.