Have you ever successfully done something based on a "how to..." you once saw?

I'm not talking about stuff l Iike icing a cake while you copy some guy on YouTube. But rather the stuff you don't need at the time. Things like "what to do in a shark attack" or "deliver a baby at home, a step by step guide". The type of stuff you think "I remember seeing a leaflet on this once..."
Have you ever successfully done something based on a how to... you once saw?
Have you ever successfully done something based on a "how to..." you once saw?
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