You can watch how the top hunter riders prepare their horses too. As well as watching the top equitation trainers, schooling their students before a class.
There is so much to be learned by observing. It is unbelievable free information, if you take the time to watch! If you have questions, ask your trainer or a fellow horseman.
When I was young, I glued myself to the warm up ring to watch the famous riders and their horses. It's wonderful to watch the rounds in the show ring. But there are sometimes even more valuable lessons to be learned in the warm up arena!