Store-bought broth and stock is already heavily salted. You shouldn't need to add more salt in your recipe. Compare the "sodium" amoung on different brands to find one that is the lowest. It's easier to add salt than to removeit. Even better and very easy is to make your own broth and you can freeze it. And if you're cooking with an already salted meat like ham, that's even more salt so keep that in mind!
Cooking wine (sold in grocery stores) is full of salt also. It's to keep people from using it as a beverage.
If you have too much salt in a broth or other liquid, you can add slices of raw potato. The potato will absorb the salt. Taste and add until it is what you want.
Sea salt is large salt particles. I use it to sprinkle on top of roasts so it melts and runs down the sides, giving flavor to the whole roast. For ordinary dishes, you will have more control of the amount of salt if you use regular table salt. A little goes a long way. Salt brings out the flavor in meats so it's a good seasoning to use. Just add it slowly and always keep in mind how much salt the main ingredient (such as ham) contains. -- You probably would not want to add salt to anything with ham, bacon, processed meats, lunchmeats.... but if you use the fat from ham or bacon for seasoning, such as with kale or spinach, remember the fat has salt in it!
Most store-bought things contain a lot of salt. Salt and sugar. It's what our taste buds react to and make things taste good. Read your ingredients label and it will help you know which brand you want to choose.
You can't give up salt for Lent. The body needs salt. It's a necessity. You can reduce the amount you use though but I would do it gradually so as not to shock your system. If you feel ill doing this, drink Gatorade. It will immediately add the proper amount of salt and other electrolytes your heart, brain and kidneys need to function properly.
Hope this helps!