Pat the salmon fillet dry with paper towels. If there are any pin bones, remove them with tweezers.
In a small bowl, combine salt and black pepper. Add other spices or herbs, if using any.
Line a baking sheet with a large piece of plastic wrap or parchment paper. Generously coat both sides of the salmon with the salt mixture and fresh dill, ensuring even coverage. Wrap the fillet tightly, making sure it is fully enclosed. Place the wrapped salmon on the baking sheet and weigh it down with a smaller tray, using kitchen weights or any heavy object to help press the fish. Refrigerate for 24 hours, flipping the wrapped salmon halfway through the curing process for even distribution of flavors.
After curing, unwrap the salmon and quickly rinse off excess salt under cold water. Pat dry well and carefully remove the skin, if desired. Sprinkle with fresh dill for serving. Using a sharp knife, thinly slice the lox at an angle, avoiding the skin.
Serve it with cream cheese, over salads, or with scrambled eggs!