We never started saving much money until we got the banks out of our lives. No debt means we could put that money into savings. We also live below our means. We live in a low tax area, so that also goes into savings. We didn't keep on swapping houses, which meant more savings. Being brought up around people who lived during the Depression helped mold our thoughts on debt.
I also didn't buy heavily into the insurance business. I had disability insurance, skipped the life insurance, and no long term care insurance.
We are now both retired, no debt, large accounts and living below our SS levels. We take multiple vacations each year. I'm now at the point of thinking about hiring my repairs out instead of doing them myself.
They really should teach kids about savings and debt when they are in school. It yields large societal gains.
You hit on perhaps the most foundational part of building wealth, living below your means. The majority of people seem to want it all and want it now or at least operate on a deficit. In part, I blame the constant bombardment of advertising. Get this now for just X easy payments. But people have to make their own decisions and think beyond 2 inches in front of their faces.
A critical piece of my personal finance philosophy is that if you cannot buy it in cash, it will have to wait (save real estate and other investments where I do like to leverage because I've easily beaten the interest payments on my returns). Otherwise, I never really needed tons of toys and have been willing to sacrifice for our future through additional effort, taking on reasonable investment risk, and spending much less than I bring in.
So I pay off my credit card bill in full every month since I've had a credit card. Immediately following undergrad, I was investing about 50% of my pay (the rule of thumb for financial advisers is 10%-13% just for retirement savings and add more for each additional financial goal that you have). When I need a new vehicle, buy in cash, and run it until it has 300k miles or so (vehicles are one of the most rapidly depreciating but necessary assets that you own).
In my view, the foundation for personal finance should be:
1) Invest in yourself (education, skills, networking, health, etc.) to increase your earnings potential and opportunities. Do this early and don't stop.
2) Spend less than you bring in and wait on personal use asset purchases that you cannot buy in cash.
3) Invest as high of a percentage of your income as you can afford and as early in life as possible. This is more fuel and time for compounding interest to work in your favor.
4) Maintain a reasonable liquid emergency fund (3 to 6 months' pay is recommended by financial advisors) so that you aren't caught having to take out harmful loans to cover unexpected expenses.
5) Cover catastrophic risks with insurance but don't over-insure. You have to make sure that major events can't derail you and your loved ones, but you can't be eating into your investment money with too many coverages and too low of deductibles.
6) Diversify your investments to spread investment risk but be aggressive, especially early in life. Prudent aggressive growth investments when your investment time horizon is long will likely yield the most growth but analyze the risk/return of those choices.
7) Continue to assess your strategy and results along the way. Modify as needed or as your needs and circumstances change.
And thank you Forrest for bringing up the need to educate kids on personal finance. It is 1000X easier if the foundation for personal finance success is established early. It's never too late to make changes if it wasn't, but it is so much easier if it is in place early.