In critical situations, correct breathing is important for maintaining physical and mental ability. Breathing is enhanced by using loud verbal commands in telling others what they must do. Mental preparation involves constructing in one's mind the actions one will take under various scenarios. A mental checklist of actions and concerns should be regularly repeated to oneself so that the stress of an actual incident does not cause the mind to become blank. Three of the most prevalent mental occurrences in a high stress event are "tunnel vision," "auditory exclusion," and "the slowing of time in the mind." These are debilitating occurrences that handicap an officer's response. This article suggests how to counter their effects. Other important aspects of officer safety are physical conditioning, skills maintenance, practice, effective communication, effective listening, observation of nonverbal cues, and the development of skill in managing the escalation and de-escalation of force. Guidelines to follow include calling for and waiting for backup in a threatening situation, gaining and maintaining control in each situation, developing a "survival mindset," and learning to manage stress.