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How to prepare hot smoked salmon 
Brine your fish. 
Brining is the process of soaking meat or fish before cooking. Each person who smokes fish has their own preferences for how to formulate a brine, but it almost always includes both a salty and a sweet flavor.
For beginners to smoking, a simple brine of kosher salt and brown sugar is a good point of departure. How much you need depends on how much fish you have.