The greatest training montage ever captured on film is the 3-odd minute training scene in Rocky III. You can check it out here if you’ve never seen it. It’s awesome. If nothing else, add the music to your inspirational playlist.
It shows a process that’s a bit a like preparing for the viva: Rocky’s in great shape but isn’t quite there yet for the competition. After your research is done and your thesis is finished you’re awesome, but you could probably still use some work for the viva. You don’t have to spar, run laps down a sunny beach or build up massive quantities of muscle though.
Read your thesis to remind yourself of everything in there. Answer some unexpected questions from your supervisor or friends. Look for ways to boost your confidence. Make some notes about what’s important. There’s lots you can do to help yourself.
Training montages show someone developing to a peak of excellence. What would be in your viva prep montage? Think about how much time you’ve got, what things you can do, then go do them.