Use the STOP acronym to remember the process. Stop what you’re doing. Take a breath. Observe what’s going on around you. Proceed. Awareness brings more intentionality and exercises your attention spam.
Deep breathing is a rhythmic repetitive motion and it helps to remove mental chatter because it can be done whenever and wherever you wish. As you breathe, put your hand on your stomach; if your hand is moving in and out you’re doing it right.