The golden mean is a concept of Aristotle related to what he saw as virtues. He said the true virtue is in the middle of two extremes, like being a coward when compared with being too reckless, the virtue would be in the middle of the two which is, being brave. When it comes to your everyday life try to do something similar when it comes to living an hedonistic way of life when compared with an ascetic one. There is a lot of propaganda in modern society that tells people to adopt violent amounts of narcissism and hedonism and it seems to be sliding more and more into full blown Satanism judging by the dark symbolism present in the media. I personally use the Golden Mean and Stoicism to moderate my way of life.