A simple technique to help calm your mind, please watch the following you tube clip
Bringing things back to basics and concentrating on your breathing can also help. Look at this resource to help you develop a go-to breathing technique, practice makes perfect. Click here.
If you like this idea why not give these other techniques a try.
You might also like this workbook with activities to try when you are feeling all sorts of different emotions. There are sections for when you feel sad, stressed or angry and some suggestions to help you generally feel good. Download your Top Tips for Feeling Good workbook here.