Every person is made up of three equally important aspects of themselves. These are your spiritual, mental and physical aspects. Typically when a person finds themselves unbalanced or feeling out of sorts we find that one or more of these three aspects has been ignored in some way.
Just as it is important for a persons spiritual growth to engage in activities such as attending or teaching courses, reading books, and talking with other like minded people there are simple steps you can take to increase your physical health and general knowledge base.
This summer take some time to see what other types of classes you can take, along with the spiritual classes you are planning to attend. Take a short spin or yoga class down at your local gym or yoga center. See if there are any regular Tai Chi groups down at the park.
Now would also be a good time to finally learn that language you have always wanted to study. With online courses so widely available for those who prefer to study at home, to night courses and organizations such as the Learning Annex for those who want to meet and mingle with other students.
I have found, and I suspect that you will as well, that when I am growing across all three aspects I am a much happier person.