I use the Spoon Theory personally to help me think about what I do each day and how I use my energy. I also share it as a resource in my role as a self-management coach with the people with long term health conditions who I support.
Recent personal experience and that of the people who I support has made me see that I need to consider more broadly how I use my spoons. This has been a very interesting thing for me to be aware of - seeing as I spend so much of my time talking about (in less theoretical terms) the biopsychosocial model. Managing my health is about the physical things, but equally, the emotional and social (or day to day) impact that my health has.