Try this exercise:
First, take one of my sample answers for any speaking question (part 1, 2 or 3). For example, you could use the first answer in last Friday's lesson. Read my answer a few times and try to remember it.
Next, hide my sample answer and try to answer the question yourself, using as much of my answer as you can remember. Record yourself giving the answer.
Finally, listen to the recording and compare your answer with my original answer. Did you make any mistakes or miss anything? If you have time, transcribe the recording so that you can analyse your answer more closely.