Mindfulness meditations could help to make you feel more relaxed. It is not about emptying your mind, or trying not to think about anything - it is about noticing how you feel and bringing yourself in to the moment, rather than worrying or thinking about the past or the future.
There are many mp3's you may like to download and try. They will guide you through the process and explain what to do. It's worth trying out a couple of different types of meditation and different presenters to find the one that works best for you.