It only takes a few seconds of mindful breathing for your body and mind to begin to come back together again. It is very easy. A child can do it. You just concentrate on your in-breath and on your out-breath. You don't think about anything else. The past, the future, your worries, your anger, and your despair are not there anymore. Only one thing is there: your in-breath and your out-breath.
You have to deeply experience breathing in and breathing out. In a sitting position, you can really enjoy breathing in and breathing out. Go ahead and enjoy breathing for twenty minutes, just being here. You are here and you have nothing to do except enjoy mindful breathing.
~ Thich Nhat Hanh