Don't be afraid to move around. I ask ahead of time if the B&G want me to "stay in the back" or if it is ok for me to get right up front. Being small I can fit behind the bridesmaids and capture the B&G from the ministers side of the ceremony. I am in the isle as they are coming down it shooting while on my knee (to be less obvious and for a nice angle). I do use the 75-200 lens so I'm not in their faces, but still get great close ups of the ceremony from a respectful distance.
There are tender moments you really want to capture - dad and his daughter talking alone before they go down the isle, son and mom as she pins on his flower.
I look through bridal magazines and collect the pages of the shots I want to incorporate into a session. Shots like rings in the boquet and close ups of the hairpiece are nice. One shot that has been requested a couple of times is a B&W of the groom on his knee as if proposing to the bride.
I am so just an amatuer, but like you guys, really enjoy what I do.