In preparation for your first lesson, try to learn from the parent the level of experience and specific needs the child has in the skill area you'll be mentoring. The objective is to effectively translate your skills to the child while keeping the lesson fun and engaging. Think about how you've been taught over the years and what has worked well with you - exercises, drills, challenges, games, etc. are all relevant. Gauge these methods to the level of the student's understanding. Remember, children tend to learn best in nurturing, fun environments.