I agree completely, while there is a fine line between being arrogant and being confident, you have to be confident when you walk in that ring. Walk in like you own the place, but have some common courtesy towards others in the ring. The most important thing is knowing your calf and knowing what they need. Judging shows now I see so many showmen that come in with a set routine they use on every animal, stop, set up, loin, scratch, loin again everytime the calf flinches, lol. Not every calf needs to be loined, and only loin when the judge is viewing the animal from behind, loining squares the calf up from hooks to pins and makes them appear much squared hipped, but if your calf is already super level hooks to pins and super square hipped, then loining may not be necessary. On the profile make sure you off set the hind feet, this serves to drop the flank a little and make the calf appear deeper sided, never loin on the profile unless your calf roaches its back, remember we want a square level top on the profile. I think those are the 2 biggest mistakes I see. We do a good job of teaching showmen what to do, but not necessarily why they are doing it, thus they often do it at the wrong time or when not necessary. The main thing is to know your calf inside out, know whats good about them to really show off, and whats bad about them that you might want to underplay. Also make sure your know all of your calf's quirks, just like people, all cattle will have an off day. If you know your heifer is having an off day and isnt gonna set up just perfect, then pick what you think is the best you will get her, and leave her. Dont spend the entire time in the ring fighting to get a calf perfect that isnt going to do it that day, a judge can never get an adequate view of a calf that you are constantly moving.
I hope this helps some, good luck with your heifer!