Instructions
Consider what command you want your horse to obey and start teaching it in small increments. Begin at an easy level for your horse. For example, if you are working with a colt that is not halter trained, start by allowing him to sniff the halter, then hold it against his neck and slowly move to put it on. Simply allow him to wear it before moving forward to getting him to lead. By working in small steps, the horse won't be intimidated or fear you and will quickly learn what you want.
Reinforce what you want from the horse every time you work with him. Be consistent so the horse knows what is expected. For example, if you want him to lunge on the lunge line, start in the same manner each time by walking him to the arena, asking him to lunge counter-clockwise at a trot, then a canter and reverse direction and repeat on the other side. When you add new elements to the task, do so in increments.
Use cues to show your horse what you want. Always use the gentlest cue possible and use both verbal and physical cues for new tasks. For example, if you want a young horse to move into a trot, use both your leg cues, seat position and "click" with your mouth to get him to move forward. These signals build his confidence, which will help him respond quickly to what you are asking.
Soften the cues and aids once the horse is responding quickly to your requests. This allows you to be gentler with the horse and it gives you more leeway if he doesn't respond. For example, if you want him to lower his head while he trots, train him with only the bare amount of pressure on the reins and as he becomes more consistent, lessen the pressure so he responds to a soft touch. If he ever resists the command, use a firmer touch again instead of resorting to a harsher method.
Push the horse through resistance in tasks that he knows well. For example, if he has consistently moved from a trot to a canter at the first request but refuses during one session, use a firmer hand and leg and push him into the canter. Do not allow him to refuse a command, but only use the minimum amount of pressure to get him to obey.
How to Get a Horse to Obey
Unlike dogs or cats, horses are prey animals. This means the approach to training them is different than with other domestic pets. They will never be as obedient as a dog, but they can quickly obey commands if properly trained. An obedient horse will know what is expected of him and quickly respond when given a cue. This is the result of regular and consistent training. When training a horse, always end each session on a positive note with plenty of praise, even if it is over something simple he has frequently done well in the past. This encourages him to anticipate the next training session and feel confident in your bond.