The viva isn’t a huge surprise. Thankfully you don’t turn around one day and-
-tell us about your contribution to knowledge!
Online or on-campus, tomorrow or six months from now, you’ll know where and when your viva will take place. You’ll know for weeks beforehand.
Knowing where and when helps your preparation: of course, read your thesis, think about your work, rehearse – and think about what you will do to arrive at that place and time, on that day, in the best state possible.
If you’re at home, what will you do beforehand? How will you arrange your viva space? How can you make it great for you?
If you’re in your department, how will you get there? What do you need to check about the room in advance? What do you need for it to be good?
At some point you’ll know where and when. Then you can start a small but useful part of the preparations for your viva.