Take a sheet of paper, divide it in two.
Down the left column write down problems for your viva. Anything you can think of that you’re worried about, or tricky questions, sticky situations, little worries and fears. Anything and everything.
Now in the right column, write at least one thing you could do for each problem. Ask a friend for help, read your thesis, learn something, do something. At least one thing – you may not know the solution for a problem, but you will definitely have ideas of where to start.
Cut the sheet in half, you now have a list of problems and a list of things that might help.
Which one do you want to focus on for your viva?
(inspired by this evergreen post of wonderful advice by Seth Godin)