Change For Your Prep
There might be a certain logic to do some of your viva prep in a different space to where you would typically work.
A different space allows you to think away from your typical environment. Maybe working at a different time could give you a new insight into how you work or what you’ve done well. Working in a different way (writing longhand rather than typing) might change the pace of your observations or the way you think about things.
Viva prep could be a really good time for changing things up as you get ready for your viva.