Using these client profile intake cards is super easy. When a client comes in for a service, fill out the card with their personal data, like name, contact info, and any allergies. As they have more services, record the details of each session on the card. This way, you can always see their full spa history at a glance. When filling out the cards, use a pen that won't smudge, so the information stays clear. To keep the cards in good condition, store them in a dry and clean place, away from direct sunlight. Don't over - crowd the cards with too much writing; keep the entries neat and organized for easy reading.