When I was an examiner, I remember that not many candidates performed well towards the end of the speaking test. After trying really hard in parts 1 and 2, many people seemed to run out of energy when they got to part 3.
So, how can you make sure that you finish strongly and do well in part 3?
I think the secret is to answer according to a simple 3-step formula: answer the question directly, then explain in detail, then give an example (e.g. a personal experience). I've included a fourth step in this lesson, but the first 3 steps are the easiest to use.
Note: You need to practise consciously going through the 3 steps as you give an answer (maybe you could count the steps on your fingers). Otherwise, you'll go back to your old technique of saying whatever comes into your head!