No doubt, I just meant instead of taking one pic for a given shot, take 3 or 4.. even if only bracketing.
As well as perhaps setting the camera for the lighting in a certain room, snap away like mad. The latter for the reception and party more than anything. Set pieces and important moments such as the speeches obviously will need better planning than that.
I'm learning here, so please do tell me if I am getting it completely wrong!
I does make sens to take several of the same instant when you recognise it is a good moment, as 'An Exception' says, it helps to avoid people blinking or pulling a strange face as they change expressions.
I don't accept focus errors or metering errors with my equipment, despite having a prosumer DSLR (D90) - I will not work with cameras or lenses that miss-focus or are not dependable. I hear some people talk about taking lots of photos because a certain lens+camera option they use wont nail the focus a significant proportion of the time, which to me a a definite equipment deficiency for the task. This just leaves more artistic concerns to worry about. For this I prefer to take a bit longer and think and observe what is happening, try to predict movements and events, to know the background, to position myself favorably for lighting or distractions, to choose focus lengths that are more appropriate, etc., etc. but always be quick to capture an event or scene as it unfolds in a blink of an eye.
When something nice happens I will often take several shots as insurance and as explained above, to minimise blinking eyes etc.
I guess what i am really saying is I wont fill memory cards with photos where a majority have to be dumped due to bad focus, bad exposure, bad composition, wrong DoF, poor lighting, distracting backgrounds, wrong focal length. Some people however seem to do just that, machine gun away and hope for a 5% keeper rate - I have that % mentioned on a forum once . He said he took 2000-3000 photos and kept the best 5% claiming that way he is providing the best of the best photos, not having to accept mediocre photos to make up the number. Not at all my philosophy.
Oh, I will also take few test photos to get a better understanding of exposure looking at RGB histograms and looking for clipping points to determine the scene's DR (don't want to blow the wedding dress). I always aim to ETTR but this is risky during weddings with so much while and black about.