I've found the best option is to embrace and enjoy myself as I am today, while at the same time implementing any consistent changes we need to improve our health (spiritual, mental, emotional, relational, physical).
I mean, I'm a Texas girl. The last thing I want is hair with no volume, and my long hair is very heavy so it can get super weighed down.
Luckily it gets dark so early in the winter it's no challenge to hop in our car after supper or after our Christmas Eve service and drive around looking at Christmas lights. We actually do this nearly every night in December before Christmas, but of course doing it on Christmas Eve makes the night so much more special.
Schedule pictures at a time when your kids are usually awake and happy. For us currently this is around 9:00 or 10:00 a.m. I know it may not be the best time for sunlight, but if your kids are going to be crying in every picture that twilight shot may not be worth it . . .