Try to be ready and on time! I often time my sessions for ideal light so if you arrive late it will impact the amount of time we can have for our session.
Full tummies make for happy kids! Make sure kids are fed, and bring some goldfish or string cheese.
Often I will separate the kiddos when I do individual or sibling portraits. This sometimes helps them relax and I can get more genuine smiles.
Family photos can be frustrating, but they don't have to be! If you start to feel frustrated with a child, just pick them up, snuggle them and show them you are happy. Kids love to be loved so take a deep breath and live in the moment.
Chapped lips and runny noses are very hard to edit out, please bring tissues if you need them and layer on that chap stick!
Focus on having fun! My goal is to capture genuine interactions and emotion, the natural smiles will come if you are actually having a good time.