Ideally you should be seated.
Close your eyes. Concentrate on your breathing; take a couple of slow deep breaths. As you breath in, imagine you are inhaling peace, light and joy. As you breath out, imagine you are ridding yourself of anything you are finding stressful at that moment, as well as any negative emotions or energy.
Now visualise a wall of light forming around you; take note of the colour(s). When the wall is complete, see it transferring into a bubble as it extends above and below, shielding you.
Spend a few moments experiencing the energy inside your bubble. It is full of peace and calm.
Start to count down from ten, slowly.
Then open your eyes.
Give yourself a moment to adjust, before standing up and continuing on with your day.