Pick good locations, and time of day.

Time of day will dictate the lighting. Different times and weathers will provide very different looks. Think of light as the paint brush painting shadows.

Keep the background as unobtrusive as possible. Balanced, as to not mess with the subject.

Consider the color palets. If you have control over clothing or setting think of color contrast and tones derived from single colors. In post, pick your dominant colors, reduce the rest.

Feel the pictures, take loads of them. Once the technical decisions made, work with feel as much as possible.