Wedding photography is a large part organiser and crowd control. You have to get the people where YOU want them, not the bar
. The actuall photography bit is more about you needing to be totally familar with your gear and switch setting without having to think about. Dont forget spare gear. And working in low light.
You have the brides house first. Usually total chaos with 23 people jammed into a room that appears to have had a few dustbins emptied into it. Here you have to get nice shots of the dress (take a proper coathanger not the plastic rubbish) and shots of the bride getting hair, makeup and dressed.
The Church/wedding venue. Here you'll be dealing with often no lighting (think black hole of Calcutta and your close) akwardly placed flowers and a vicar/official who doesn't want you taking photos or if your lucky just not using flash (dont photograph the register signing, set up a fake after, they'll have a tilt if you shoot the actually signing)
Then theres setting up the groups, who goes where, making them look good, checking ties are done up and pocket flaps out... and no pint glasses. Plus of course getting them out of the bar. Have a plan for where and how you'll shoot if it's chucking it down with rain.
Couple shots. This is the point you take the couple off on your own. Take a bridesmaid or best man to help carrythe flowers etc. Here your posing them and getting the serious shots that'll hang on the wall, depending on the venue this can be easy or a nightmate, tell the couple it's time for them to chill out a bit too, try to have a bit of fun with them at this point too.
The wedding "breakfast" or bunfight as I like to call it comes next. Here the speeches will be done in the semi dark with a mirror behind the top table. This seems to be the trend. Things happen fast here, brides crying, best men getting kissed or punched, anything goes, but it's quick.
The last part is the first dance. Again, darkess seems the in thing, if theres DJ lighting it'll be multi coloured and quite possible laser (so dont get it in the lens, some can burn a sensor) and all over the place.
There! how easy was that... now a few days editing and job done....