When an older relative gives life advice from 1985, say thanks and keep what still works.

Advice carries the shape of the world it was formed in, and some of that world is gone. Walking into a shop to ask for the manager worked then and often does not now, while the thing underneath it, that showing up in person is memorable, still holds. Sorting the principle from the method is your job rather than theirs. Arguing about the details loses you the useful part.

Take the next piece of dated advice and ask what it was actually about. Say thanks, which costs nothing, and keep the part that survives. Then ask what they would do now, since people are often sharper than their stories.