Chronic stress is a global epidemic, but in the United States, 42% of adults say they are not doing enough to manage stress. Additionally, 1 in 5 adults report doing nothing to manage their stress. A variety of relaxation methods attempt to mitigate the effects of long-term stress, but they can be non-intuitive, difficult to use, or unsuited for daily life. This paper proposes to study the usability and design of deep breathing biofeedback guides for in-situ relaxation. The author will achieve this by designing a biofeedback guide, developing robust measures of arousal from wearable sensors, and conducting a long-term study with the intervention in a workplace environment. When completed, these studies will compose the foundation for the authors dissertation.