Think about what you want to focus on before each session. You can write down times when you feel like you’ve "slipped up", or when you feel like you are making progress, or insights you have, and bring these up with when you come in.
Be yourself. I need to see you as you are--you don't need to say you are fine when you are not.
Following each session, think about what we talked about and what you learned. You might want to discuss it with a friend or family member, or write about it.
If I suggest that you do some "homework," try to follow through.
Taking time for reflection is an important part of mental health, and while you are in therapy it is especially important. You need time to process all that you are learning.