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Absolutely, yes.
Even a week before, it’s good to get used to doing mock auditions at the time of your audition – and at other possible times as well, assuming you advance and might have to do two in a day. Get used to eating the same things and going through the same morning ritual that you will have on audition day as well, but also be sure to practice auditioning in enough adverse circumstances that no matter what happens on audition day, it won’t throw you too much. Too cold? Too hot? Cold and hot? Have to go to the bathroom? Crazy tired? Shoes too tight?
The whole idea is that you don’t want to be distracted by new and different things. If you’ve gotten comfortable auditioning at 8am, 11pm, and 4am, with a metronome at a different tempo and a fan blowing air at your music, no matter what craziness ensues, it’ll be no big deal and you won’t pay it much mind. You’ll be able to focus on the things that do matter, and prevent yourself from wasting energy getting all worked up and stressing about the unexpectedness or unfairness about a situation you can’t do much to change anyhow.
Incidentally, Power Sleep (James Maas) is a good book to read about the importance of sleep and its relation to peak performance. Make sure you get enough of it in the weeks leading up to your audition so that a bad night of sleep or two won’t affect your energy reserves (and consequently, your ability to focus) too badly. Here’s an article that gets at this a bit: http://www.thedailybeast.com/articles/2012/08/12/sleep-your-way-to-the-top-how-sleep-equals-success.html
