Techniques for remaining calm on the day itself

Go to your exams early. Usually, teachers or exam officers advise you to be there ten or fifteen minutes before. Arrive with the right essentials. Your teacher or lecturer should tell you whats necessary beforehand.
Dont chat to every person you know who is also taking the exam. Exam nerves can be catching and you can feel more nervous beside someone else who is feeling anxious. If you are waiting before going into the exam room, take out a good book to read for a few minutes and just ease the stress away.
You could try a few of your flash cards, but dont get yourself flustered. Nerves can make it more difficult to recall. Try a few gentle breathing techniques if you find your breathing starts to get out of control.
Dont be distracted by anyone else inside the exam room. This is your exam and at the end of the day its going to be your results that matter to you. Put your hand up and inform an officer if anyone is being particularly distracting. Relax and answer as many questions as you can. If you have time left at the end, go over them and check spelling or punctuation.