Fall back/spring forward is a great mnemonic for a time when people manually set their clocks. But it adds an extra mental step for the information I actually want, which is “do I gain an hour of sleep, or lose one?” As someone who loves Spring and finds Fall quite a drag, my mnemonic is: “it’s compensatory”: I’m compensated for the suckiness of fall with 1 extra hour of sleep, and compensated for the suckiness of losing an hour of sleep with the best season of the year.