Sadhana is the means, the vehicle, the conscious transformation of tendencies

I think sadhana is like the soap used to clean up everything else.

Thereafter the sadhana itself is dropped in the end like the soap is dropped.

Since, the sadhana is 100% conscious, it can be easily dropped.

So the sadhana has to encompass all of the unconscious binds first.

Then it becomes like a vehicle where you can live life freely from that vantage.

All sadhana then is to ultimately transform the unconscious tendencies into conscious practices.

All sadhanas if done diligently will lead to siddhis/specific attainments.

Sciences of transformation = Kriyas

asanas, pranayama breathing (nadi shuddhi, ujjayi, kapalbharti, bhastrika), bandhas, mudras (yoga mudra, kechari), mantras (nada yoga), consecrated chants.