She is absolutely stunning, I literally gasped when I clicked this thread!
As for advice, make sure you eat breakfast before the show! Lol, you'll need the energy. Also, I recommend always taking a bottle of water with you and some snacks, just in case there's nowhere to get food/drink at the show. Bigger shows usually have something, but smaller ones may not.
Remember that even if it goes really badly, and you get disqualified in all events or totally lose badly, just remember that it was experience! You'll learn from it. Winning isn't everything, just as long as you and your horse get through it together, you'll have learnt a lot :) Just have fun!
Satin Reign aka "Misty"... my life, my love, my everything.