As with all photography lighting is key. If you are shooting inside and can’t afford expensive lighting use the most flattering and cheapest form of light there is – sun light! Position your group facing or parallel to a large clean window, if it is a particularly bright day cover it with a thin veil of material, such as a net curtain or peg a white cotton sheet across to act as a diffuser for softer, more flattering light.
I know that many readers feel that they don’t have the time for shooting in RAW (due to extra processing) but a wedding is one time that it can be particularly useful as it gives so much more flexibility to manipulate shots after taking them. Weddings can present photographers with tricky lighting which result in the need to manipulate exposure and white balance after the fact – RAW will help with this considerably.
There are a few bonuses to using accessories well (as well as layers). One is that changing them up a bit throughout the session can give you multiple looks without having to do many wardrobe changes. They can also be something that the subjects can interact with. A sassy little tip of the hat, holding the ends of a scarf while running and letting it billow behind you, grabbing the lapels of a husbands jacket while pulling him close for a kiss – all these little gestures and ways to interact (and become more comfortable in front of the camera) can be made possible with styling choices. Many of my sessions will feature items used outside their intended use or subject. My girls are often seen in mommy’s hats or scarves (scarves can be used in different ways like wrapped around their shoulders, as a hair piece, etc) and they love to wear my costume jewelry.