After your viva tell your story to anyone who you think it will help. Why you did a PhD, how you got through it, what happened at the viva – share practical help but also how it felt as you were working your way through. Help others see that they can make it through too, that it’s not luck or chance.
Before your viva tell your story to yourself. Remind yourself of what you did to get as far as you have. Find words to describe how you overcame obstacles and resolved problems. Help yourself see and believe that you are capable, talented and not lucky.