Viva coming up? Offer to take your friends out for coffee. Buy their attention for the price of an americano, or if summer arrives a frappuccino.
There’s a lot you can do in forty minutes over a coffee.
If your friend has some understanding of your research then give them a good summary of what you’ve done; ask them for questions, what do they need to know? What wasn’t clear?
Are they a good friend? Give them a chapter or two to read ahead of time, and over a latte dive straight into questions. What do they want to know? What are their thoughts?
Really good friend? Give them your thesis draft a few weeks before and brace yourself for questions. You may need to buy them a muffin.
You can get some valuable help from friends over coffee. Chances to practise questions, opportunities to think some more about your work. Really valuable. Your friends get something valuable too: they get the chance to see someone who is close to the finish line. They can read your thesis and see a possible format for theirs. They can be inspired by you.
And they get coffee!