How to be an adult.

1) Play by the rules.
2) Agree to disagree.
3) Conflict of interests between two or more adults means calm, direct communication, which results in some form of compromise or general agreement.
4) Display a level of maturity which is socially acceptable according to one's numerical age, which is determined by one's birth year.
5) Acquire and hold on to some form of job or career.
6) Be respectful, even towards one's enemies.
7) Be civil, even towards one's enemies.
8) Abide by socially accepted laws and statutes.
9) Reign in reckless behavior.
10) Take responsibility for one's own actions.

If you want to be labeled an adult, don't act like a child.