In case you missed the advice at the end of the video lesson that I shared last week, here's my main tip for each of the 3 parts in the speaking test:
Focus on fluency. You don't need to show off with great vocabulary or grammar in this part. Just try to answer quickly, without hesitating. A short, simple answer is fine.
Focus on ideas / vocabulary. This is your best chance to impress the examiner with some nice language, especially if you've prepared for common topics in the way I suggest in my video lessons.
Focus on your answer structure. Use the 3 or 4 steps that I explained in last week's video. This will force you to give longer answers without repeating yourself. You don't really have time to think about good vocabulary or grammar; just worry about answering the question by following the steps.
Notice that I don't recommend worrying about grammar or linking at any point in the speaking test. Finally, if you forget every other exam tip, just remember one thing: answer the question!