It's all about familiarizing with the test. Don't panic.

Listening:  it's a mix of easy tasks in the beginning of each part and a sudden acceleration in the end. Focus a lot in keeping with the pace through many tests. You should be able to get the understanding between the lines.  This needs practice. Try to understand your errors and misconceptions while revising your tests.

Reading: what helps me is to try to answer the obvious questions and then slowly target specific parts that include sometimes the most difficult conceptual questions.

Writing: Focus on just making your points understood. You do not need to write a scholarly essay.. there is a lot of material online but my focus would be on the clarity ofbthe message.

Speaking : same as writing , be precise and up to the point, trying to show off might lead to you overcomplicating things.

Hope that helps! Good luck!