In becoming aware of the sense of self, it greatly helps to have a practice that enables shifting out of habitual modes into a more open and spacious awareness. One key to this is noticing the awareness, rather than objects of awareness, which creates a shift towards allowing. The self is known by this awareness (as well as body sensations, thoughts, and emotions). This beholding awareness can know the self as it arises and passes, as the sense of solidity increases and decreases. This also helps us tap into the sense of completeness of being awareness — where there is nothing missing and no self-deficiency.
This practice begins with belly breathing while counting the length of inhales and exhales, moving from equal duration, to longer exhales. This is a powerful practice for quickly calming and grounding.