Starting off with a clear vision of difficult topics. Discuss how the student prefers to be helped, wether it's the content they struggle with or the practice. Typically I'll give 3 examples of one method and create 3 more practice questions for the student to feel more comfortable. If there are any feelings of doubt after the session I create a new set of questions with a different approach to build more confidence in the student. I've had tutoring in the past for a level science and have picked up their approach to tutoring, it gave me focus and more enjoyment in school after spending time talking to someone about my doubts or struggles with a topic.