Picturing a relaxing location, setting or scene can help quiet your mind.
Try thinking of a favourite spot that makes you feel calm and happy and put yourself there for a moment. Now engage your senses like you're actually there.
Focus on the details. Can you see the colours? Hear the sounds? Feel the sensations in your body.
Take some deep breaths while you enjoy this happy place in your mind and then return to your work with renewed focus and a sense of calm.