I would add that you need to turn your focus assist light off, it can be as annoying as a flash.
You might also suggest that people shoot in raw as it allows your post processing to bring in some detail that you will miss if your just using a jpeg.
Might also suggest people do test shots at home to see how high they can really go with their ISO. I know that while my camera will shoot 25,600 it is completely unusable, and while a high ISO of 6400 might look fine in a well lit area it may look like poop when its used in low light... so people should do tests to see the limitations of their camera before they go.
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