The 5 mindfulness practices, all of which have been validated in prior research.

Body Scan practice will consist of how to direct non-judgmental attention to different regions of the body

The Mindful Breathing practice will consist of focused attention on the breath and metacognitive monitoring and acceptance of discursive thoughts, negative emotions, and body sensations.

The Mindfulness of Discomfort practice will consist of instruction in how to "zoom in" to deconstruct discomfort and precisely map each feelings' spatial location, use mindful breathing to "zoom out" and broaden the field of awareness to include neglected sensory elements, and shift attention from unpleasant feelings to neutral/pleasant sensations or experiences.

The Savoring practice will consist of instruction in identifying and amplifying pleasant memories.

The Loving-Kindness practice will consist of instruction in cultivating feeling of warmth and compassion toward the self and others.

To assess the acute anxiolytic effects of a brief mindfulness intervention during radiation therapy (RT) for patients with anxiety related to RT for breast and gynecological cancers.

Acute anxiety during RT will be measured at each treatment visit with an individual item ("How nervous, anxious or on edge do you feel right now?" scored on a 0 (not at all) to 10 (Very much). derived from the Generalized Anxiety Disorder 2-item (GAD-2) scale, measured before and after RT. The change from before to after RT will be averaged over all treatment visits.

To assess the distal anxiolytic effects of a brief mindfulness intervention during RT for patients with anxiety related to RT for breast and gynecological cancers.

Anxiety in everyday life will be measured using the total score of the Generalized Anxiety Disorder 2-item (GAD-2) scale prior to RT (minimum value 0, maximum value 6, score of 3 or higher considered clinical). This will be measured once a week during RT.