I have had over 15 years of training and riding horses. My main focus when starting a new horse or correcting bad habits is looking at the basic ground manners of a horse.
Is your horse engaging with you?
Does your horse respect your space?
Does your horse listen to your verbal commands and body language?
Is your horse reacting out of fear or defiance?
Does your horse think through their problems?
All of these questions I address so I can understand and correct a horse's behavior. These are the basic building blocks to create a better partnership between owner and horse.