They should add the biggest one that is going to keep people struggling for life:
Stop acting like you deserve "the finer things" before you have the money in hand to pay for them.
The cycle of working a bit hard for a while and then splurging on a fancy trip, another pair of $300 shoes or purse, the fancy car, the bottle of $$ wine or liquor... when you have debt, you should see those things not as rewards or indulgences, but as what they truly are: a heavy, chain hat to keeping you poor and silly and expensive ways to show off for your also-poor friends and family.
And to go even deeper: Labels, brand names and other silly signs of expensive spending are only ONLY for impressing others that equate money spend=self worth. Find other, healthier ways to define your self worth and get personal satisfaction.