Ever since I realized that one teaspoon of salt has somewhere around 2300 milligrams of sodium, which is about the same as our recommended daily allowance, and knowing how bad for us salt is, I've been drastically cutting back on salt intake.
I no longer salt pasta water, I don't add salt to things that contain other things that are already salty (like soy sauce, ham, etc.), and I rarely add salt at the table (unless it's corn on the cob, or if whomever made dinner didn't salt it at all or nearly enough).
I used to oversalt things and just dealt with it or didn't eat it. But I've never oversalted anything like soup.