Equiniphile don't you live near me? :) We should go training together!!! How close are you to the Medina/Wadsworth/Copley area? I could hook you up with my (awesome!!) trainer if you don't already have one!
Another great thing to do for an up and coming Eventer (if it hasn't been said already) is lots of desensitization training...we have "scary jump night" every now and then and we'll put horse blankets draped over a vertical, cones underneath one, etc. just to get the horses used to different, strange looking things, so that when you go out on your cross country course your horse doesn't balk at the first hay bale jump he sees LOL ;)
"The times when you have seen only one set of footprints in the sand, is when I carried you..."