We must work toward a constant state of self-observation where we become more and more connected with the observer who is objectively observing "it" (the observed). Self-observing requires conscious effort; the observer is the rememberer, who becomes the doer, who becomes. (Paul Beidler)
Self Observation is preparation for Self Remembering. Through its practice we gain insight into the content and working of our three centers.
Here is a classic Buddhist book on Self Observation -
The Endless Search © 2004 Ian C. MacFarlane