Processed food is probably where you get most of your salt. Foods don't have to taste salty to be high in sodium. Some bread and rolls, soups, frozen pizza, and cold cuts are all high.
Read labels. You may be shocked at how much sodium is in your food. Make sure you know how much one serving is. If you eat two servings, you'll get twice as much sodium.
If your blood pressure is even a little above normal, stick to 1,500 mg of sodium a day. That's less than a teaspoon of salt.