A lot of old-school financial advice seems to focus on the importance of saving and avoidance of debt. It seems reasonable but I always wonder how applicable that is in the modern times with our record-low interest rates. Short look at the tables in [1] suggests that, for example, you could gen 5% after-tax real returns on government bonds in the 19 century. Today, that would be unthinkable.
[1] http://efinance.org.cn/cn/fm/The%20Equity%20Premium%20Stock%...