My family's motto growing up was "Eat all mistakes." It mostly applied to not wasting food, even if you messed it up. So when I baked cookies in the oven after my mom made a roast, but forgot to turn the temperature down and burned the shit out of them, I had to eat them all. Stuff like that. It really taught me to pay more attention, and appreciate when food was good, even if it wasn't my favorite.

Nowadays I use it for a lot of things - if I decide to watch a show that ends up not being great, I'll eat my mistake and finish the season before dropping it. If I start a hobby that I end up not being as motivated to do as I initially thought I'd be, I eat my mistake and use up the materials I bought before stopping.

It both gives me an opportunity to make sure I really don't like something before I give up on it, and also trains me to not dive too deep into something before I know whether I'm going to enjoy it.