I'm assisting a film crew and doing some wedding shots next weekend and have a few questions. I have some experience with this kind of thing but I want to make sure I'm as prepared as possible. I guess my main two questions are: -What are the 'key' shots that I should get for the wedding? There's the obvious ones, but I'm sure there's a number of other types of shots that you folks (as photographers) have found to be favorites of the couple or essential to give them? -Secondly is about etiquette. Is there any definite no-no's or anything that I should be aware of at the wedding? I don't mean in terms of the photo's I'm taking, but how to act/dress/communicate at the wedding. Is flash always alright to use?