my only financial advice is this:
do not use a credit card, ever. they're literal bait, designed to trick people into overspending and getting fleeced by interest.
do not take out loans for consumerism. a holiday trip, a wedding ring, a fancy car, whatever it is, do NOT go in debt for these things. only take out loans for the purpose of long term investments that have real value and yield real returns, such as buying real estate or starting/expanding your own business.
i've seen people get fucking ruined over these things. debt can be very insidious and do some real serious damage.
Got to disagree about credit cards.. Credit cards are essential for building credit (which controls damn near everything today) and the miles I get from rewards pay for at least 2 airline tickets every year.
I typically just put all of my automatic bill payments (utilities, insurance, etx.) on my card as well as any groceries or home goods (with which I maintain a strict budget).
However, given the average American is about as intelligent as MovieBob, I think your advice would be beneficial to the vast majority of the population, who exercise zero willpower.