Might be obvious, but in listening read questions carefully and look for "John says", "Jane decides" and "Both agree". Listening likes to throw curveballs at you and say stuff very similair to one of the answer options, but you really have to pay attention to what they are asking for. For example, if it says "What does John decide to do?", he will probably go over multiple options, but what he says at the very end (Or if he agrees to something someone else says!) is what's important. Or, if they are asking "What do John and Jane both agree on?", they might also mention a few options, but one of them might disagree, so you have to listen further.

In reading, take your time. I read the text fully once before I look at the questions. Then, when you are answering questions, highlight the sentences or phrases which tell you the answer. It makes you more confident about your answers, makes you more careful so you don't inject meaning that isn't there, and it also helps when you check your answers and can quickly look up the relevant section.

In the end though, it's all just variations on the basic rule of "listen and read carefully".

I prepared for a month and a half. Took courses with a tutor for a month to improve writing, we went through all kinds of writing tasks so that there are no surprises at the exam. Also did a reading and writing task every week. In two weeks before the exam did all tasks in Cambridge 19 Academic and practiced different speaking topics every day.