There are many ways in which you can make self-assessments of yourself, but often you can do this by keeping notes in a diary, journal, or a daily log of a specific behavior. If a certain behavior is destructive, negative, or pulling you in directions that aren't in your favor. Modifying these behaviors can then allow you to feel more positive, have better direction, and also can be beneficial to you. Norms are rules, models, or patterns of a particular group. Norms are very societal based so depending on location, norms vary tremendously.
Norms are a cultural factor.
One may have a particular interest in an idea, thought, perspective, etc. Due to these strong feelings, one may form a bias which serves to put ones own ideas in favor over others. It allows for the benefit for the self despite the fact that there are other sides to the idea. Biases are often used to justify behaviors that have adversity. I tried to document those incidences in which I was affected in some way by the incident.