Hi!
Here's a thing to note: table salt is comprised 40% of sodium. So, the amounts for salt intake and sodium intake are not the same. Just something to be aware of when you're looking at labels or recipes.
Reading labels is the primary way you're going to get the sodium out of your diet. The amount of sodium jammed into our foods is staggering.
Start by taking a look at the sodium content in your sauces and spreads: salad dressings(!), jarred or canned pasta sauces, ketchup, bbq, mustard, relish, mayonnaise, Miracle Whip, butter, margarine, soy, hoisin, sweet & sour, etc. I was astonished at what I found in those.
Also, bread is very high in sodium; it's required for the rising process. Read labels, and see if your store offers a low sodium version.
Processed meats are off the charts. Ergo, between the bread, sauces, and meats, a submarine sandwich, even a low-fat one, is freakishly high in sodium. And as Kathryn said, the canned/processed foods are terrible, terrible, terrible! I'm seeing more and more "no salt added" canned vegetables lately, which is wonderful. I can buy unsalted tomato sauce, diced tomatoes, corn, peas, and a few others. Tomato paste can be easily found without added salt, and nicely intensifies the flavour of a home made pasta sauce made with a can of unsalted tomato sauce and Italian spices (basil, oregano).
Also, Miss Vickies has an unsalted potato chip that is delish. I buy unsalted, non-hydrogenated margarine, or use unsalted butter for everything that requires butter. We've gotten used to eating our popcorn unsalted: we pop it in canola oil, and use some unsalted butter/margarine.
Beware of ANY kind of frozen meat, yes even good ol' boneless, skinless chicken breasts. They use salt water to keep the meat plump and juicy. Your best bet is to always buy your meat (and fruit & veggies) fresh.
In general, when a product is created to be "low fat" or "reduced sugar", they will add salt to replace the flavour. Usually I find I'm having to choose between fat/sugar in my product, or sodium.
If you want some standard, mainstream advice for reducing your sodium intake, start doing some research on the D.A.S.H. diet (Dietary Approach to Stopping Hypertension). It's been around for at least 20 years, and offers very sensible guidelines. There are a number of good low-sodium cookbooks on the market that are DASH-diet compatible. My two favourites are:
500 Low Sodium Recipes, by Dick Logue; and
The Low Salt Cookbook, 3rd ed. by the American Heart Association.
The Logue book has a lot of tasty low-sodium versions of things like ketchup, mustard, mayonnaise, bbq sauce, etc. All the things that are jam-packed with sodium, but enhance your meals!
Good luck with this dietary change! I found it much harder to get the salt out of our diet than to reduce the fat or the sugar. Once you create new cooking habits, it'll get much easier.
Cheers,
Sandra