What else should one do to penetrate and transform the deeper layers of the unconscious beyond the practice of awareness?

According to Osho, there is no other way: the unconscious is only the absence of consciousness, so only awareness dispels it. Use any method that kindles awareness, then stay watchful at the boundary where impulses (like anger) surface. Attend to the branches in consciousness until steady seeing turns into a subtle light that reveals and transforms the roots.