In this podcast I share part of a client session around the issue of quitting smoking. Even if you are not a smoker you will find this helpful and informative. This session provides a number of clear examples of how we can make the connection from a physiological feeling, in this case the desire to smoke a cigarette, to thoughts and memories from the past.
There are three main takeaways from this audio that are applicable to any tapping situation:

how to move from physical to emotional issues
how cleaning up one emotion related to a symptom can uncover more emotions tied to the same symptom
how the symptoms can return as we tune into new emotions, showing us that there is still more work to be done