Pat the 1 pound salmon filets dry with paper towels.
Preheat a 12- or 14-inch nonstick skillet over medium-high heat until hot (about 1–2 minutes).
Rub the salmon all over with 1 tablespoon olive oil.
Sprinkle and rub about 1 tablespoon blackened seasoning evenly over both sides of the salmon.
Place the salmon in the hot skillet presentation-side down (if the filets have skin, place skin-side down). Do not overcrowd the pan.
Cook undisturbed for 3–4 minutes.
Carefully flip the filets and cook 3–4 minutes more, or until the salmon is opaque, flakes easily, and reaches an internal temperature of 145 degrees Fahrenheit.
Remove from the skillet and let rest for a couple of minutes before serving.