Prepare a thick salmon fillet with the skin on by patting the flesh dry with a paper towel. Rub the olive oil into the flesh all over, then season just the top of the salmon fillet with salt, lemon pepper, garlic powder, and Italian seasoning. At your discretion, you may choose to cover and marinate your salmon in a refrigerator for 1-2 hours. Otherwise, continue by heating a cast-iron skillet or good quality non-stick skillet over medium-high heat on the stove.
When the skillet is hot, place the salmon in the skillet seasoned side down. Use a pair of tongs or a spatula to gently press the salmon skin down after about 30 seconds of cooking to seal the fat inside. Let the salmon cook on in the skillet undisturbed until the seasoning naturally chars and releases from the skillet – about 3 minutes. Use a pair of tongs to rotate the salmon and sear it on the other fleshy sides.
After the salmon naturally releases from searing, return it so the seasoned side is facing up and the skin is against the hot skillet. Reduce the stove heat to low, then squeeze the lemon juice over the salmon so it infuses the flesh. Pour white wine vinegar and Worcestershire sauce into the skillet, then immediately cover it with a lid. Let the salmon finish cooking another 4-5 minutes at low heat while the other ingredients caramelize around the bottom of the fillet. Serve hot.