Salt tends to be a bit of a dampener if you’re working to retain your good health and weight under control. It provides dietary sodium and helps contribute qualitative flavor to your foods, but at the same time, it is important to ensure that it is at its minimum, so as not to augment bloating and water retention. The best way to do this is to flavour your food alternatively. Here are some ways to do just that:

1. Cooking techniques: Use sautéing, grilling, and roasting in your cooking methods. They bring out the natural caramelizing properties in foods and really seal in the natural flavors and juices of meats and vegetables. Sautéing involves using a pan to cook foods at high temperatures for short periods of time. Grilling sears in flavor, creating a “crust” on the outside that keeps juices in. Roasting allows cooking the ingredient in its own liquid content.

2. Use herbs and spices to add flavour to your dishes. They add a rich taste that can distract from the need for salt, and therefore be a great substitute for salt.

3. Use citrus: Lemon, lime or even zest can bring a zingy taste to your dishes. Citrus juices are perfect when it comes to augmenting flavour instead of salt.

4. Add flavour filled accompaniments such as onions, peppers, garlic, ginger and more into your food. Use aromatic vegetables to add a distinctive flavor and aroma into the meal. It is also a good idea to use fresh ginger and horseradish.

5. Cook with oils and flavored oils: When you use flavoured oils, you don’t miss out on salt. Add extra-virgin olive oil or walnut oil to a garden-fresh salad mix or top off a stir-fry with a dash of sesame oil. You can infuse neutral oils, such as canola, safflower, and grape seed oils, with spices and herbs to give them unique flavors as well.

6. Use marinades, vinegars and spice mixes to create a mélange of flavours and to avoid unnecessary salt content.
Source:
http://www.dummies.com/how-to/content/10-ways-to-add-flavor-without-salt.html