Here's my advice:
Outfits: pick 2 or 3 coordinating outfits. One fancier and one casual. It's also in nice if one of the outfits is your wedding colors so you can use them for save the dates or guest book (I design those) ;) or to display as canvas at your wedding. As matchyness- choose three colors and try and incorporate those into both your outfits. You'll match without being matchy.
Props: I'm happy to incorporate anything you bring but to keep session unique, I don't provide any.
Looking gorgeous: I'd recommend getting your hair and makeup done for the shoot. It will mean one less thing to stress about and ensure you look your best. Elizabeth Marie makeup is excellent. Also, makeup tends to fade on camera, so applying a little more will ensure your features really pop.
Bling: get your ring that day or the day before so it's extra sparkly! Also, maybe sure your nails are either clean or free of chips. :)