Viva coming up? For one day, pause your usual preparation. Don’t analyse the contribution in each chapter. Don’t frantically search for typos. Don’t read through and worry what your examiners will say about this chapter or that choice.
Just take a page and write down what you love about your thesis.
What do you really love about it? What ideas do you adore? How does it make you happy? (it’s OK if “it’s done!” is the answer!)
What are you grateful for in your thesis? What inspires you? What can’t you wait to show others?
Find all the good stuff, and use that to motivate you for the rest of your prep and the viva.