Have you done your best? Viv Groskop talks to writer and second Children's Laureate Anne Fine, about the freedom of being well prepared. She says: if I've done my best and they don't like it, that's their problem. She talks about why she hates interactive talks and how much you can learn from bad speakers. And she argues you should never overestimate an audience's knowledge or underestimate their intelligence - particularly when talking to children. You can find out more about Anne Fine and her new book, Aftershocks here. A new updated edition of Viv's book, How to Own the Room is out now. @vivgroskop