Moderation
"Moderation in all things is the best policy." -Plautus, 250-184 bc; paraphrasing Hesiod, c. 700 bc
It has been a well-known moral imperative for at least 3000 years that moderation is the key to happiness and well-being.
Moderation allows for indulgence in the great pleasures of life like food, sex, money, power, drugs and alcohol, while being aware of their potential for abuse and intentionally avoiding the temptation towards excess and addiction.
Political Moderation
Balance of Power is the principle of moderation applied to politics and economics.It is Yin and Yang. Opposing forces create a feedback loop that keeps either one from exerting authoritarian control.
Content Moderation
On any online platform with user-generated content, a robust, transparent, and fair content moderation policy is necessary to avoid trolling your way into becoming yet another extremist echo chamber outrage competition.
While it is a different usage of the word moderation, the effect of effective moderation is to moderate the collective consciousness of the users on that platform.
Check the wiki page for the content moderation policy for this wiki.
Make it Easy to be Moderate
To achieve moderation, it is easier to create an environment that incentivizes it rather than relying on willpower, which doesn't really exist.
The Video Virtues of Moderation
Every religion extolls the virtue of moderation so you might want to pay attention to what they are saying.