What are some good substitutes for salt for those on low sodium diets? I try to keep my sodium intake fairly low to ensure that my blood pressure doesn't get too high.

Salt is such a common part of cooking, and it's especially difficult to cook Asian-style food without a lot of salt due to its reliance on salty sauces such as soy sauce, oyster sauce, etc.

I have tried salt substitutes such as potassium chloride but that can be particularly nasty on the palate, giving the food a chemical taste.

What are some good substitutes for salt in food?
There is no substitute for salt. Sorry. It has effects on the tastebuds and the body that cannot be replicated.

However! They can be approached to a degree that most people will find interchangeable. Acids can mimic the flavour-enhancing qualities of salt in a big way. The more acid you have in a dish, the less salt you will need. Beware of going too far, of course, as too much acid is just unpleasant and will need salt to counterbalance.

Heat--as in capsaicin, chili peppers--can produce much the same effect.

Echoing papin's information above; NA and K (sodium and potassium) exist in balance in the body. Too far in one direction and you have a heart attack (too much K), too much in the other and (if memory serves; I could be wrong) you essentially drown (or is it edema? I can't remember). If avoiding sodium is related to a health concern, please speak to your primary healthcare provider before adjusting your diet in this way.