I quite like Colson Whitehead’s tongue-in-cheek writing advice:
Rule No. 6: What isn’t said is as important as what is said. In many classic short stories, the real action occurs in the silences. Try to keep all the good stuff off the page.
Some “real world” practice might help. The next time your partner comes home, ignore his or her existence for 30 minutes, and then blurt out “That’s it!” and drive the car onto the neighbor’s lawn. When your children approach at bedtime, squeeze their shoulders meaningfully and, if you’re a woman, smear your lipstick across your face with the back of your wrist, or, if you’re a man, weep violently until they say, “It’s O.K., Dad.”
Drink out of a chipped mug, a souvenir from a family vacation or weekend getaway in better times, one that can trigger a two-paragraph compare/contrast description later on. It’s a bit like Method acting. Simply let this thought guide your every word and gesture: “Something is wrong — can you guess what it is?” If you’re going for something a little more postmodern, repeat the above, but with fish.