My recommendation is to cook and substitute when possible!
For example, if you want to have toast, mash up an avocado and spread that on toast with a little black pepper and it makes a delicious replacement for butter. (Avocado has no sodium)
It is also possible to sub in avocado for butter when baking, as long as you are making something a little more flavorful than sugar cookies.
Always try using some ground black pepper in place of salt, it gives you a little something extra without the sodium, and besides that it can be nice to use Rosemary as a main spice. I put rosemary in baked or mashed potatoes and it's amazing.
Good luck, hope this helps a little