A key question to ask during your viva preparation, not about your thesis but for yourself. What are you missing?
- Do you find it difficult to remember key references?
- Do you wish you could remember where things are in your thesis?
- Do you need to know more about what to expect?
- Do you know nothing about your examiners?
- Do you feel unconfident?
All of these problems can be solved. There are posts on all of these topics on this blog, and lots of people around you will have helpful advice too. If you don’t know what you’re missing, ask a PhD graduate what they think was missing for them; tell them what you’re doing or plan to do to see if they see anything missing.
Whatever is missing can be figured out. Whatever the problem you can find a solution before your viva.