Make sure you know which ring and what class/breed in before you so you can keep check when you're in.
Get there in plenty of time to check out where you can set up your crates, grooming tables, etc. The closer to your ring the better
Try to get ringside early so you can watch the judge you are showing under, that way you will know their ring procedure and gaiting pattern (they don't vary it at all, except for showing on/off the table, depending on breed). You can also watch other exhibitors handling their dogs to see how to do the individual exam without interfering with the judge.
Have your dog groomed, clean (don't forget teeth!) and ready to go as much as possible before you go, so that before you show is mainly touch ups and comb out, not a full groom!
If you have a choice, try not to be the first in the ring, but not the last, that way you can watch the others if you are unsure what to do. If you are first in the ring don't be shy about clarifying instructions if you don't understand something. If you are first in, and the class is moving as a group, it is polite to ask the person behind you "ready?" to make sure everyone is on their feet and ready to move (also, you won't take off and have the judge miss your dogs best moments while he/she looks to see where the rest of the class is
)
If you have a dog in front of you when you are gaiting as a group, give yourself enough room so that you don't run up on them (just like with horse shows)
Imagine you are showing the judge the most precious beautiful jewel and treat your dog accordingly
And most of all: HAVE FUN!
