A student of mine asked me to give him just one key piece of advice for each part of the IELTS test. After giving it some thought, here is my answer:
Focus on vocabulary instead of grammar or linking. In parts 2 and 3, explain your ideas in detail to increase your vocabulary score.
Use the breaks to read ahead. When they give you half a minute to check your answers, don't! Use the time to get ready for the next section.
Get to the end! Miss the questions you find difficult, and make sure you do all of the easier ones. Return to the harder questions if you have time.
Writing Task 1
Write a good overview. Examiners want to see a summary of the information, as well as detailed description.
Writing Task 2
Spend more time planning. A good plan will help you to write a more organised essay with better ideas.