Progressive Muscle Relaxation and Abdominal Breathing Worksheets

...and others at the University of New South Wales (via Psychology Tools). Progressive muscle relaxation and controlled abdominal breathing live in the appendix of a big book about treating co-occurring substance use and mental health problems. You need neither to benefit.

And from University of Houston Counseling, a varied collection of worksheets, audio, and video. Click "Guided Imagery and Visualization" for more progressive muscle relaxation and breathing guidance.