4. Facial expressions
If you're shooting in a home or professional studio, why not try shooting tethered to your computer?
Shooting this way enables you see your shots instantly on a big screen to review them more accurately – then you can instantly work out what to do to improve them, whether it's to move a light closer, to turn it up or down, to add a reflector, or change your exposure for brighter or darker results. It's also very handy as you can give clear instructions to your subjects to pose in a different way by showing them on the monitor what you'd like them to do differently for the next round of shots.