Marinades typically include a fat of some type such as oil, an acidic ingredient such as vinegar or lemon or lime juice, seasonings like ginger, garlic, rosemary, etc. Usually no salt.
You can vary the ingredients to make the type of marinade you want. You could use soy sauce and sesame oil for an Asian type marinade.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan