Simply: place the palpating hand over the tissues in question and with the other hand manipulate the spine or extremity until the area beneath the hand maximally softens.
Downside: requires much practice to feel the maximal point of released tissues
Upside: there is hardly any memorization. It is all by feel.
Instructions: Greenman’s Principles of Manual Manipulation, 2nd edition and Positional Release Techniques by Chaitow.
What is important: YOU CAN FIND THE RELEASE POINT IF YOU PLAY WITH SOFTENING TISSUES AND FIND MAXIMAL PATIENT COMFORT