Body is the means to nurture soul, so to keep it pure and supportive, we must perform Yogasanas the first step towards Sadhana.
The steps of Asanas should be followed by Pranayam. Pranayam leads a Sadhak to gain mind control.
Then follows the stage of Dhyan. Dhyan increases efficiency of the Sadhak and leads him to spiritual progress.
Yogiraj has experienced himself Omkar Shatchakrabhedan and Yog-Nidra. He claims that all these Kriyas / yogic processes are attainable to anybody. Self-experience depends on physical and spiritual ability of a Sadhak. Tratak Sadhana is a simple way for self-revelation.