Grammar: Get more confidence with your verbs and word order to increase your natural fluency
Delivery: not only your pronunciation and how fluently you speak is important but also your intonation and, above all, you need to focus on a natural delivery which doesn't sound over-rehearsed or as if you are reading. Practising face-to face will improve all these aspects as well as relieve nerves
Vocabulary Retention: Learn techniques for learning vocabulary and enjoy impressing your examiners and teachers with a wider vocabulary