Off the shelf
Oyster sauce gives dishes added punch
Use it straight from the bottle over stir-fry and noodle dishes; it is often used with oil over steamed greens.
Drizzle a little over scrambled eggs in place of salt or soy sauce.
To cut the saltiness, add some mirin or sugar and a little chicken broth.
Expensive brands (usually less salty) are worth it for their flavor; refrigerate after opening.