Foundation with titanium dioxide
Ever seen a picture of yourself where your face looked oddly white or had pale patches? That's probably thanks to titanium dioxide. This common foundation and concealer ingredient is a great natural sunscreen, but its reflective properties interfere with camera flash, making your face look "ghosted." So unless you're going flash-free, make sure the product you're wearing isn't chock full of the stuff.
Yes, the beehive is back, but when it comes to photos (especially group pictures) big hair is a mistake for a bunch of reasons. If you're part of a large group, it's going to be hard to place you anywhere without obscuring someone else's face. And even if you're by yourself, huge hair makes it difficult for a photographer to get everything in, so you'll end up with odd angles and maybe an unflattering photo crop.
Understated lip and cheek color
On a normal day sheer, soft blush and lip color might be more than sufficient, but when you're going to be in photos, it's best to go for a full face. Photos tend to flatten and blanch out features, so having a little extra color is a smart way to ensure that you come out looking like yourself.