The first step is to become brilliant at observing everything about your horse. Not just the bad behaviour, but observe what happened before the bad behaviour. What happened before what happened happened.
Do as much homework as possible on anybody you allow to interact with your horse. Do as much preparation as possible before you allow somebody to work with your horse.
Horse people (especially professional horse people) often credit their knowledge to the horses they have worked with. In my experience, this is mostly not true.
Sometimes I hold the lead rope very short - under the chin, at the point it attaches to the halter. Other times my hold gives the horse the full length of the rope to search for an idea.
The psychic stuff and the need to make trainin and understandin horses somethin so mystical takes away from ordinary people the realization that we all have the ability to be good horse people.