Self-care: Get a good night's rest the day before your sessions and make sure you are well hydrated. Moisturize your skin if it tends to be dry. Bring lip balm or lipstick to the session.
Manage your time: Keep your stress level low, don't rush to your appointment. Do plan to arrive 5-10 minutes early. Give yourself plenty of time to get where you need to be afterward.
Hair and make-up: Consider taking advantage of a professional hair stylist and make-up artist. Their expertise can make you feel stunning without compromising your personal style by creating a natural look that compliments your features. And a little TLC can go a long way and help you feel more confident in front of the camera. If you prefer to apply make-up yourself, avoid products that are glittery and keep it natural. Prepare as if you were going to a job interview.
Clothing: Wear clothes that fit well. If it has been a while since you have worn the outfit you are considering, try it on several days in advance so that you have time to make adjustments or look for a new outfit if need be. Avoid outfits that looks seasonal. Instead, choose something that is more of a timeless staple. Lean toward solid colors avoiding busy patterns or strips, outfits with logos. Take time to press out wrinkles. Remove loose threads, lint, hair clippings, or pet hair. Clean eyeglass lenses so that they are free of smudges.
Jewelry: Accessories can really bring a look together. Keep jewelry simple and avoid large pieces that might distract from your face unless it is compliments the look you are trying to achieve.