We are challenged to develop & practice self-care and coping strategies in order to remain regulated and grounded. The guided breathing technics taught on so many apps and by many meditations, teachers are effective if practice regularly to lover stress and increase the feeling of calmness and well being.
I find that some people get more anxious when following on breathing. In that case, I recommend using a sensation in the body as a focal point. For example, noticing the soles of the feet against the floor or hands on the lap as a way to bring attention and awareness to the present.