I may be able to help. My DH has high blood pressure and has to keep to very low sodium diet.
Basically... best to make as much as possible from scratch. We got a bread maker - all the recipes say you have to put some salt in but that just isn't true. Tastes a bit odd to start with but you get used to it.
Dont use cook-in sauces. its not hard to fry up an onion and a few veg and throw in a can of toms or whatever.
Be careful about things like curry powder/paste - most are v salty. Use individual spices. Rajah do a garam masala with no salt. Lemon juice helps in a low salt curry.
Cheese - most are salty. Emmenthal and mozzarella are the best bets - emmenthal is good for sandwiches and for cooking.
eating lots of fresh fruit and veg helps as they are naturally low sodium.
Obviously enough, cured meats like bacon, ham, salami are high salt. DH loves them - so portion control is the key here, use more like a seasoning than as the main part of a meal.
thats all I can think of right now but will check back if you have any specific questions - if I don't know then I may want to know too!