One of the most valuable tips is related to safety.
If you have a big group in a flat class, and you’re at all concerned, trot them in both directions and then split them to canter.
I usually have them all trot both ways and then all line up in the middle. Then I will count how many are in there, divide them in half, and have the announcer say: “Number 123, walk forward to the rail and track to your left. Everyone to her left, do the same and spread out.”
Then canter the first group both directions, have them line back up in the middle, and then canter the other group in both directions.
If it’s a really big class, you could even divide them into more than two groups. It takes a few extra minutes, but it’s still quicker and safer than having to regroup from a short stirrup rodeo.
I’m sure I’ll come up with more suggestions when I have a minute, but that’s an important one! Lol.
Also for the flat classes, try to be relatively prompt. You don’t want to make them go around for so long that somebody makes a mistake or a horse blows up and you lose your winner.
Try to write down as many of their numbers as you can before the flat class even starts, along with a brief description, so you know which horse goes with which number. For example, Ch WF 4, for the chestnut with a white face and four socks.
I don’t usually bother putting scores down for flat classes, but I will try to write down the back numbers in the general order that I like, and then use arrows pointing up or down as the class progresses and I see them do more, along with little notations like WL for wrong lead, etc, etc.
If one makes a big error of some kind in a flat class, I will usually cross out that number so I don’t use it at the end by mistake.
If you are communicating with your ingate person or announcer by radio, make sure to press the button, wait a second, and THEN start to speak, preferably with an unimportant word.
There is often a little time lag between the time you press the button and the time the radio starts to transmit, so give yourself a little buffer zone there. It will improve communications a lot!
If you can get a schedule with the number of entries in each class so you know how many to expect, that is extremely helpful. And be sure to write the name of your announcer and ingate person on your schedule so you don’t forget by the end of the day. Lol.
Good luck and have fun. I guarantee that after you judge, you will be much more aware of how things look when you’re an exhibitor.