Mix up a blend of your favorite spices and include Kosher Salt. For instance, a blend I might throw together would be:
Salt
Cumin
Chile Powder
Oregano
Cayenne Pepper
Garlic Powder (I use this infrequently but it would work here)
Rub this all over the outside of the chicken, and get your hand under the skin of the chicken and rub some directly on the meat. Sprinkle some inside as well. You can do this with Italian Seasonings, Greek, etc. Roast the chix as usual and the aroma will fill the house.
Alternatively, you can make a paste of garlic, fresh herbs, salt, pepper and olive oil and push it under the skin, then roast as usual.