Horse show checklists: (not sure how much they overlap, sorry) Download a Horse Show Checklist and Stall Card http://horsemechanic.com/yahoo_site_...t.10994556.pdf Horse Grooming: Horse Show Checklists by Cherry Hill
For those that don't own but may be helpful. This was made by someone on this forum, but I forget who: Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
Since it's schooling you could probably cut down on most of the things mentioned on the checklists.
I'm sorry, but I don't know a lot about Western showing.
As for confidence, I like to pretend that I'm just riding in front of my instructor and my best friend. It helps a little. Also remember to breathe, relax, and smile! A show is supposed to be fun!