Part of my newborn sessions always includes photographing tiny newborn hands and feet. I try to plan it in when the newborn isn’t quite asleep. That way, I’m not wasting any time. I’m waiting for baby to be soothed to sleep and getting some of the very important details. In fact, if babies are moving just a little it adds so much to the photo. Seeing toes curl up and hands grab on is just adorable.
There are times when it’s better for the baby to be asleep (like if you want fingers extended).
The other thing I like to do is photograph the series of details in the same color way. That way a parent could hang the detail shots together without worrying about contrasting colors.