Most of the things that drive you mad or break your heart today will not matter in a few months / years time.
Be the person that you are proud of no matter where, who or how.
Adapt you not. Hold your frame and firm your stance.
Be literal not. The majority in the real world do not care about sincere exchange of content. It the communication of status and underlying intent that matters.
Fear you not. Challenge the authority.
Assume the role of the teacher, the wise elder , not the complaining student or hurt victim.
The steel-like “self-belief”. Earn it.
Act boldly, or act you not.