While I couldn't agree more about keeping your level of enthusiasm high, since Michael Richards took the helm as producer, the show no longer caters to the "Loyal Friends and True," the faithful who watch the show every day and know all of TPIR's intricacies. You will get a lot of advice here, on golden-road.net and other sources about the unwritten Ten Chances rule, the Cover-Up and Now...or Then strategies, non-repeating digits in Golden Road, etc. Take in as many words of wisdom as you can from these sources. View recent episodes and analyze them to death. Memorize prices in your head if you wish. But once you step onto CBS TV City property, I would highly suggest that you not tell a soul anything you know about how the show works. Not the interviewer. Not the pages. Not the people waiting with you in line. Your every move is being watched at all times, more than it ever has been.
FWIW, I was on the show in 1996, and when I tried out again in 2008 once Barker left, I wore a T-shirt that said "Loyal Friend & Drew." Today, if you were to wear a shirt like this, you might as well just go home. (BTW, I didn't get picked that next time.)
Smile and laugh at everything everybody says or does, no matter how absolutely idiotic or cheesy they may seem.
You will be lined up with 10 people at a time for your interview and once it's your turn you will have less than 15 seconds to sell yourself. Be enthusiastic but be geniune. Do not lie about the slightest thing. They will pick up on it instantly. As Tim mentioned, they asked his wife a few follow-up questions and she was picked. In the group of 10 from my show in 1996, Phil Wayne asked everyone two questions, but he asked only me a third question: "Brian, you look very familiar. Where have I seen you before?" I told him with a smile that I had tried out for the TPIR on Memorial Day of the previous year. That was the God-honest truth. He then jokingly said to his assistant, "Oh yeah, I do remember that day, don't you?" and she said, "Oh, of course!" The whole group got a chuckle out of that! I was the first one in line that day and the first to be called to "Come on Down!"
I hope this helps. Keep us posted and GOOD LUCK!!!
Brian