This question already has an answer here:

I am soon going to make my first wedding shot. I am scared as I dont know what is important and what to look for. What are the keypoints at wedding photography? What should I be aware of? What gear do I need?

merged by John Cavan Aug 21 '13 at 13:12

This question was merged with How do I prepare best for my first wedding photography event? because it is an exact duplicate of that question.