Salt is in so many things we don't realize, and don't really know the amounts. Learning to read the nutritional information labels is a great start to educate yourself on a variety of things.... one of which is sodium.
Another tip is to replace salt with flavor. Complete Seasoning by Badia has 90mg of sodium in a 1/4 teaspoon serving. It's really good on eggs, veggies, salads, fish etc. Kirkland (Costco) Organic No-Salt Seasoning contains 21spices and ingredients, and no salt. Using products like this can cut a lot of 'cooking salt' and 'table salt' out of your diet.
In some things, I've found a little heat like cayenne will over-ride the need for salt. Also, do some research into Redmond Real Salt. It's not processed and contains trace minerals. I've read statements from the company and testimonials that were interesting.