Hold your breath and start doing a simple movement as hip circles or neck bows and so on. Let all the accumulated tension from the breath hold come out through this movement and take yourself a little further than you are used to. Work on doing this drill using your entire body part by part and as a whole and slowly the movements will become smaller and smaller and you will gain a lot of freedom of movement and relaxation.
This drill and more are a part of my DVD. I will post more further on when it will be available.
Remember to smile, it relaxes you.