Don’t Panic!!!
Don’t panic during your prep or in the viva.
Don’t do it. De-list it as an option. It’s not on the table.
Find something that looks like a mistake in your thesis? Don’t panic. What can you do instead?
Examiner asks an odd question? Don’t panic. What can you do instead?
Examiner makes a critical comment? Don’t panic. What can you do instead?
If you weren’t allowed to panic, what would you do instead?