Use a cheesecloth to line a pan just large enough to hold your salmon, making sure there is a 2 inch overhang. Lay salmon on the cheesecloth, skin-side down.
Combine salt, sugar, lemon zest and pepper in a small bowl. Sprinkle the salt mixture evenly over the salmon. Scatter herbs on top. Wrap the salmon tightly with the cheesecloth. Brush the top of the cheesecloth with tequila, making sure the cloth is evenly moist. Place another baking pan or large plate on top of the salmon (it should be big enough to cover the salmon but small enough to fit inside the larger pan). Place 2 heavy cans inside the smaller pan (or on the plate) to weight it down. Refrigerate for 2 to 3 days to cure.
To serve, gently wipe the salt mixture off the salmon. Slice the salmon very thinly at an angle, leaving the skin behind.
Chef's tip: It it's all too much, just do tequila shots.