In a bowl mix all ingredients together using back of fork or spoon to break up any hard pieces of brown sugar.
Place salmon fillet on a cutting board and pour rub on top. Use hands to gently press it on so it doesn't fall off. If you want a more intense flavor cover with plastic wrap and put in fridge for an hour or more before cooking.
Lay salmon on baking sheet with foil if making in the oven or on a smoker we use a grate. Allow excess to fall off on to the cutting board.