A lot of people around you will say “good luck” before your viva.
They can do a lot more if you ask.
Your supervisor might say good luck, and mean it, but what they really mean is they hope you can demonstrate what they know you can do on the day. Good luck might feel good, but if you’re not sure about your talents, or if you want more help (perhaps with a mock viva or more feedback) then ask.
Your researcher friends might say good luck, and mean it, but what they really mean is they hope your viva will be alright. They hope the process and the questions will be fair to you. Good luck is nice, but they can do more if they can tell you about what they know or what their experiences were like. Ask them. Find out more and feel better.
Your friends or family might say good luck, and mean it, but what they might mean is “I don’t understand what you do. I don’t know what you do. A viva? Is it a test? Well, good luck then!” And good luck is well meant, but you might need help from them. You might need time or space to think. Thank them for the well wishes, and tell them what your viva is, what it means, what you need to do to prepare and what they can do to support you.
Good luck is nice, but good luck isn’t good enough.
Luck doesn’t pass the viva, work does – and support helps.