Be fluent and liberated. Speak fluently and spontaneously and practise answering sample questions.
Try to talk as much as you can. Talk as fluently as possible and be spontaneous. Relax, be confident and enjoy using your English.
Remain calm. The more anxious and uncomfortable you are, the more difficult it’ll be to keep up your fluency and maintain coherence.
Know what the examiner wants and use interesting vocabulary. Use lots of linking words such as “and", “also", etc.