You should have learnt from these IELTS speaking questions and answers to:
*Stay on topic
Listen carefully to the question and make sure you are answering it. Don't talk about something completely different just so you can talk for longer.
*Extend your answers
Give reasons for your answer. This can be a useful way to extend your responses. Always explain WHY you have given the answer that you have.
*Don't speak excessively
Extend your answers but don't go on too much. This will only mean the examiner will have to keep interrupting you to move onto the next questions.
*Be honest but positive
Try to remain upbeat and positive even if you are saying you don't do things or don't enjoy things you are being asked about. You can always put a positive slant on your answers.