This is why people eat soups for colds. The soups are a heat source and the steam tends to help the runny nose. Changing heat and humidity helps a lot. Wipe your nose not with kleenex but with small hot towels you wet and put in the microwave for a dozen seconds (absolutely make sure it’s a microwave-safe fabric towel). Get a warm drink too and take it to a warm room.
Warning: None of this work if your allergies are acting up, as I found out.