Everyone
Some things to keep in mind.
HAIR.... Avoid changing your hairstyle or cutting your hair right before your session. Let it be natural. Quick easy hairstyle changes during your session are OK, but make it quick or you lose camera time. Bring your hair care tools and products. Make sure you like the look in the mirror. Hair style is ultimately YOUR responsibility.
PROPS BRING THEM!! Bring props that help define who you are. Some popular choices are: Sports equipment (soccer ball, football, golf clubs), sports uniforms, musical instruments (from school tuba to rock guitar), activities (dance leotard and shoes, swimming, hobbies, you name it!). You can be photographed with your vehicles, motorcycles, cars, or trucks during your outdoor session.
GLASSES...Most glasses glare! Some prescriptions more than others, even the non glare ones. Your best bet is to check with your eye doctor. Most will "loan" you an empty set of frames similar to yours for your photo session. An older pair of glasses without lenses is a good option.
COMPLEXION We retouch blemishes, so don't worry about minor breakouts.
PETS.... Pets are OK as long as they are house broken. It is a good idea to have a family member bring a pet, then leave with them after. Or bring a pet carrier to contain them while you are being photographed without them. Treats can be helpful to hold a dogs attention.