I clean my tack and give my horse a bath. I also lunge my horse for 10 min to see if he has any bucks in him that he needs to get out. I also brush him off and use dream coat. You want to make sure your horse is sound and everything fits him a week in advance.
Clean my gear, wash horse (braid if I need to), stable the horse the night before the comp and I don’t ride the day before the comp either. I also make sure at least a week beforehand that my horse is sound and my gear fits.
The 2 Days before, i don’t ride. I let my horse have fun and be relaxed and do a lot of groundwork and lunging. You don’t want them to be worn out the day of the show
Clean everything and get everything ready a day or so before you leave.
I polish my boots, make sure my show clothes are clean, clean my tack, pack feed and tack for my horse and stuff.