I haven't done one for Maritz but I have done audits for another MSC. Here's what I have learned:
* Always take all your paperwork.
* Check your camera space and clean it up the day before.
* Be sure to take along extra camera batteries and two pens. You don't want to be buying anything at the store you are auditing. (In fact, my main auditing job prohibits it.)
* Memorize what you are supposed to do if the manager or whoever objects to the audit. You don't want to have to be scrambling through your paperwork to figure out what to do in that case in real time.
* While it is good to take extra photos, my biggest time sink during my report is sorting through 250 photos for the 50 that I need. Especially in the beginning, sure, take extras. But after you have done a few, you'll know more what to expect, how your camera skills are, and how good is your camera.
* Be sure your camera has a preview function so you can check your photo of anything critical before moving on to the next shot.