White and off white colors can wash out your makeup. And so can photography lights. Work with a cosmetician to perfect a makeup that looks natural on you but won't fade. Bring a swatch of your wedding gown with you or better yet, find a Tee shirt that matches your gown and wear it while you are being made up and while you practice the makeup. There are different shades of white, some have a hint of blue, some yellow and some are stark white. Your skin tones will look different against each of these "whites".
Have a practice run at the hair salon and bring your wedding veil and head piece. You might think that an updo will be perfect with your veil only to find out it just doesn't work.
Wear your wedding shoes around the house for an hour or so a few days before the wedding. New shoes rub. You don't want to limp down the ai
Buy doubles of all the cosmetics you plan on using for the wedding and pack up a bag to take with you. Include eye makeup remover, cotton swabs, and cotton pads as well. If you wear contact lenses bring an extra pair and any paraphernalia you need. You could also include breath freshener, a needle and thread, hairspray, a few hair pins, and super glue. Do NOT apply the super glue yourself, but it will come in handy if a hem rips, or a noticeable bead pops off your dress. Again have someone else do the gluing the only thing you want to be stuck to on your wedding day is your groom.