The original Taoist path to immortality aimed to cultivate/refine the etheric energy of the initiate into a perfected and 'primordial' state. When one cuts away the moralist elements that were inserted by the enemy, the religion is really just the understanding and practice of true spirituality. From my current studies in the form, I have found that the practice provided by Taoist Master Mantak Chia to be the most practical and workable for those interested in Qigong practice. Unfortunately lacking in this tradition of practice is the mantra aspect of the path which is the most powerful amongst all. However, one can still achieve a high level of spiritual development through a consistent and daily practice of the exercises provided. I note that one can do both the exercises from the Yogic and Qigong traditions as they both empower the soul differently and can cover what the other lacks.
This is a basic outline of the steps provided by Chia that I will go into more detail at a later date. These are nine alchemical stages of inner practice with each step building upon the mastery of the former. This practice supposedly and eventually results in the Magnum Opus.
1: Primordial Force Activation
2: Sexual Alchemy Practice
3: Fusion of the Five Elements & Eight Pakua Forces
4: Lesser Enlightenment of Kan & Li
5: Greater Enlightenment of Kan & Li
6: Greatest Enlightenment of Kan & Li
7: Sealing of the Five Senses
8: Congress on Heaven & Earth
9: Reunion of Heaven and Man (Return to Tao)
High Priest Lucius Oria
https://groups.yahoo.com/neo/groups/OrientalSatanicAlliance/info

