First, were do you want to catch these Salmon, in a river or the ocean? Since salmon migrate from fresh water to salt water and then back to the same river they came from to spawn and die. Will you be fishing in the Pacific of the Atlantic ocean, if you chose the ocean?
The reason I ask that is that I am only experience with catching them in the Pacific ocean. The best way to catch them in the Pacific is find were a school of salmon are running and then use a live bait fish like a sardine. It would take a whole hub to tell the techniques people use to catch this fish, and salmon is not expertise. However this is a good start!