I like Ted Kooser's advice to writers, about details. Details carry power. Unexpected, unpredictable details carry authenticating power. Here's what he says...
"Just keep in mind that it won't be the birthday cake covered with twinkling candles that will make readers feel you were really at the party, but the bone-handled serving fork with one tine missing and the place where the lace has pulled loose from the hem of the tablecloth."
I consider that this might be true in life too... if I pay attention to the details of the lives of my friends, my spouse, my children, they may truly sense that I've "been there," in a powerfully authentic way.
The Poetry Home Repair Manual, by Ted Kooser