In Blackjack, you’ve got the option to “double-down” on 9, 10, or 11. You receive just one additional card and double your bet, upping your reward—and risk—for that single hand. Without delving too far into the math, the double-down is an optimal play. The double down is a good metaphor for life.
I sent the following email to a popular exercise instructor on Youtube. His website had a page listing his hourly rates for training and educational services. His company thanked me for the email and said they’d make my recommended changes immediately.