along with MareCare
, I applaud you for wanting that partnership with your horse! At risk of getting bashed, I suggest Parelli teaching on horse psychology; PP has the info on how horses see things, what motivates them in life, & how to be such a good leader for them that they do, indeed, want to be with you. They also have the 4 main "horsenalities" info, which could help you understand your mare's psychology better, for then knowing how to handle her effectively. You can try ebay
for used PP material/advert on forums. I do not say that PP has it together in riding, but I do recommend their horse psychology, & 7 Games groundwork.