How does one stop unreliable behaviors if he/she doesn't even know they are doing them or remember doing them?

How does one stop unreliable behaviors if he/she doesn't even know they are doing them or remember doing them?
the person may own ocd and drugs could help try and control her disruptive behavior. if it does not disrupt her or his day by day life, nil is really wrong with it.
what type of behaviors do they overlook?like have breakfast this morning or actually assaulting or self abusive towards others or variable shopping etc.