In order to pass the IELTS exam with the highest bad required; you need to:

1. At least dedicate 30 min daily for studying new vocabulary or listening to an English news or article

2. Follow a scheduale daily to do any exercise either reading or writing

3. Read some model answers for speaking section in order to learn about the strategies and different approaches

4. Start slowly slowly in order to be always on good path but consistent

5. You use the IELTS Cambridge for Vocabulary in order to learn academic vocabulary

Good luck