Speak as much English as you can
Prepare yourself for the exam by knowing what is involved
You need to sound natural and not if you have learnt answers by heart. Be spontaneous and relevant.
Do not be put off by the recorder in the room. Its there to help you not examiner
Be positive. The exam is almost over. So smile and breathe evenly.
Remember that the adrenaline produced by your nervous feeling actually helps you to perform better.
Use a wide range of vocabulary. People generally use less vocabulary they know when they speak. Practice to activate what you know.
Concentrate generally on what you are saying rather than being accurate. Then you’ll make fewer mistakes.
Practice speaking clearly. This doesn’t mean slowly but naturally and evenly.