It's funny, but I have seen “Uncle Bob” ruin more wedding photos than you could possibly believe. What I mean by this is that there will (almost) always be someone in the wedding party who likes to get in the way. They either tell people how to pose while you're trying to get everyone in the right spot, or they step in front of you to take pictures, etc. The wedding photographer must be CONFIDENT and take charge. Simply saying something like “Thanks for your help. I'm trying to do something a little different here. Is it all right with you if I go ahead and get the posing set up here?” It might seem forward, but your couple will be glad to see you moving quickly and getting the photos done correctly. (Thanks Julie Gallagher)
When styling a photo session, I like to start out with a basic color palette and go from there. It can help to have one “rock star” in the photos who carries a pattern in their outfit that the rest of the group’s clothing or accessories pulls from, while keeping everyone else’s outfits more simple. You can do this with a neutral and a few colorful brights, or try a softer palette that has different tonal ranges of the same shades.