Z is for Zing
You should show energy and enthusiasm in your appraisal.
Be ready to talk about what projects and work you have particularly enjoyed throughout the year, what you are keen to get involved in / do more of over the next year.
You should show enthusiasm for your role, the company and show your commitment.
In preparation for this it can help to keep a note of these things in your journal so that you can easily refer back to what you have enjoyed most throughout the whole year.