Check out my public food journal for some tips on what to eat. I keep my sodium to under 2000 mg on many days now, although I do dip into the occasional 3K grams.
VitoVino - free online diet and fitness journal
When I first started tracking sodium I too was shocked, and I too was getting about 6K grams a day. The ONLY way to bring this under control is to "eat clean", eliminate many canned foods, and to cook your own foods.
Since I'm no longer a moderator I've made my public journal viewable to only friends. So if anyone wants to see this they'll have to send me a friend request. How? Tag search "fitday friends".