Forgo the standard "stand them all in front of a backdrop thing".
Develop a style that stands out.
My guy used to use the Planting Fields here in NY.
http://www.plantingfields.org/facolities/Wedding.cfm
He climbed 20 feet up a tree to get one of the hundred incredible shots that he took for us.
He put me and the wife in a field, climbed the tree, shot us thru a hole in the canopy with us off center. Spectacular shot.
Upside to it is he makes a ton more money because you just can't decide and end up purchasing way more than you planned on.
Also organization. Prepare a "form" for your clients. Have them list all the mandatory must do family combo shots. That way no one gets missed, you can run it like an assembly line and get it over with quickly, time is money.
Don't limit yourself to taking photos, you are a part of a couples most special day. I watched my guy and during the reception when there were no shots to be taken he was prowling the hall, instructing the staff to attend to things that were out of place, keeping the tables bused and orderly so they everything looked its best for the photos. I even saw him boot the wedding bands roadie because he was wearing jeans. He did a better job managing the room than the catering manager.
Stuff like that will get you recomendations. Word of mouth is huge for building the business.
My guy got 5 gigs from my wedding alone he was that impressive.
Good luck.