Ahead of your viva, reflect on the significant and original contribution you’ve made through your research. It’s a topic that your examiners will have to discuss with you during the viva, so it will help to be prepared to talk about what you’ve done.
A key question to help reflection could be to consider, “Why does it matter?” What is it about your work that makes a difference? What will others see in it? Think, make some notes and have a conversation with someone about why your work matters.
And remind yourself that your work does matter – it must, after all you have put into your research.