I finally made my own little what-to-wear guide. This is actually what I'm thinking of having my own family wear to our upcoming photo session. My daughter's two favorite colors at the moment are pink and green, so I thought I'd play off of that. We are a definite flip-flop and jeans kind of family, so this "look" really fits our style. I actually love that the greens and pinks are slightly different from each other, and they aren't matchy-matchy. It's a good thing.
If you are looking for something to wear to your next session, work from a color palette, and wear something that suits your family. Make your kids stand out by bringing along some accessories or toys they love. Most of all, be you.