Listening is a paper that many candidates fail to prepare for properly: there is just as much skill in listening as any other paper and more to the point you don't just need to practise, you need to practise in the right way. If you just practise, practise, practise, there is a good chance you won't get any better.
One tip is to do each practice test at least 3 times:
1. test yourself
2. read through with the transcript to see where the correct answers were and why you were wrong
3. A week or so later retest yourself
Phase 2 is the really important part: that's where you will do your learning. Sadly, it's also the part many candidates forget to do.
Another basic tip is not to focus just on a few words in the question: this is probably what causes most of the avoidable mistakes. Rather what you need to do is to focus on the
whole question as you listen. To show what I mean by this I have prepared a short video tutorial that I can't post here, but if you want to view it, you can find it here: