Oh! Okay, then, make sure you clip your horses ears and little feathers on his 'heels' that will give him a nicer more cleaned up look.
And his whiskers on his nose should be clipped to. Actually, at a schooling show I don't think you need to clip. Just make sure he is very clean, his whites are white, and that he has hoof polish and is well turned out, you should be very neatly turned out too, no hair coming out from under your helmet, polished boots etc.etc.etc.
And I would do hunter braids, Managing Mane Braiding - HorseChannel.com
this looked liek a good website for it. :)
Do you have a trainer or friend to help you clip and stuff if you do want to do that?