I don't shoot weddings on purpose but if someone waves the right money in my face I will. The secret for me -- I'm a sweater -- is to dress light, like a waiter, no tie, staying cool is the primary goal here -- with a couple shirts and small hand towels in reserve. I stash a gear bag in the corner and just shoot one camera at a time, and I pause and check everything right before the important moments. I move around a lot, squat and pop up, etc. and shoot as high an ISO and as wide a lens as possible. Sometimes I put a towel around my neck like I'm back in the Nam (jk). And I try to shoot less than anybody because editing the real bitch. It's an athletic event.
The other thing I love to do is to piss off the priest or whomever since I know I will never shoot at the same place twice. Right at the peak point, step up and get close and get the shots. F-em!!!
My friend is a conventional wedding shooter -- Canons, long zooms, all that junk -- edits 3000 pictures in Lightroom and uses a post processing service -- he does generic suburban crap. And it sure is!
Keep lubricated with light beer, shoot loose, and have fun! There are such great shots to get during the reception. Watching a hot bride getting dressed is fun too.
Finally, don't shoot an ugly bride and groom. That is hell. Good looking people make the difference, shallow and superficial as that sounds -- it is true.
My favorite wedding was Lesbians having a Native American ceremoney, we all got nakeed and did a sweat in one of those portable sweat lodges. Hilarious strange photos. Stinky hippies. Peace Pipes. Fun ;-)
Really, don't worry so much and have fun, it will show in the pix.
