Yours must be different to mine then, as I don't have a clue what I'll have to talk about! Mine is on Wednesday this week, and I've just made sure that I have set phrases that I can add into any conversation (and change it slightly) so I definitely get a range of tenses in, including the subjunctive. Also, as you know what topic you're talking about, make sure you've got topic specific vocab as that's what the examiner will be expecting. It's also a good idea to have sentence starters and comparative phrases so that your conversation sounds confident and fluent, as that's mainly what the examiners are looking for. Good luck!
Yeah I only know the topic area I've been given and my teacher has given me some practice questions do you know any french radio or channels I could listen to. Thanks and good luck to you too!