Anyway, it addressed how cinnamon and other such spices can make food seem sweeter, and garlic and such can replace salt. Salt can also replace fat, in my experience, though it's not quite good for you.
One thing I really like is to put a little bit of chicken boullion on my rice or noodles instead of butter. It adds sodium, but not much (if any) more than butter, and it's yummy.
Also good on rice is Zatarain's creole seasoning.