When preparing for a makeup appointment, it's crucial to communicate your preferences clearly to the makeup artist. This includes detailing the desired look you're aiming for, any specific products you prefer or allergies you may have, and any concerns regarding your skin. Bringing along inspiration in the form of pictures or references can further assist the makeup artist in understanding your style preferences. Additionally, wearing comfortable clothing, such as a button-down shirt or something easy to remove, can prevent messing up your hair and makeup when changing into your event attire. If the makeup artist will also be styling your hair, ensure it's clean and dry before the appointment, and don't hesitate to communicate any specific hairstyle preferences in advance.