Here's a quick, fun recipe for making your own lox.
You'll need fresh salmon, make sure it looks nice and red and not spoiled when you buy it. Kosher salt and sugar for salting and for spices, I'm currently using dill and dry mint.
Remove skin from the salmon pieces. Mix together 3 parts salt and 1 part sugar and sprinkle on both sides making sure there's a nice even layer. Very sparsely sprinkle dill on both sides. For each side, crumble 1 dry mint leaf with your fingers and sprinkle on top of the dill. Cover with another plate and refrigerate for 24 hours. Check the salmon occasionally and remove any liquid from the plate.
To make the cure salmon resemble lox, place a 1lb metal can, for example, of tomato sauce, on top. The sugar to salt ratio can be varied as long as there's at least 2 parts salt to 1 part sugar. For flavoring you can also use parsley, crushed black pepper or any other spices you like.