I think everyone has really hit it on the head. I have been running a private pheasant farm for a few years now and also guide labs for groups all the time. I have had many first timers out and insist they have a veteran or myself next to them in the line.

Here are my few bits of advice:

Be safe..this can't be streessed enough. Keep your safety on until you shoot and after you shoot. Sometimes rookies and even veteransget caught up in the action and forget safety.

Also keep your shots well above the dogs. Hunting dogs are $ and many times family to their owners. Don't shoot them. Let the bird get up.
It is more sporting that way as well.

Shoot a gun that is comfortable for you. Shoot some clays before your hunt if possible to get the rust off and familiarize yourself to the gun.

As mentioned by ShaneP, the vets ussually let the new guy take the first shot(s). Getting a shot,off hit or miss, allows you to relax a little and enjoy the hunt more.

Let the person running the dogs set the pace. A good guide will let you know if you are not in-line.

Take it all in. Watching the dogs work, the flushing bird, the hits and misses, the time spent away from work with family and friends and the delicious flavor to come of a well prepared bird. Warning: It is addictive !!!!!
Pheasant hunting on a game farm or in the wild is incredible and is meant to be enjoyed.

HAVE A GREAT TIME !!!!

-Mathewsconquest2