Cook the rice per the instructions on your rice package.
Once the rice is done cooking, cut the nori sheet into three evenly sized strips. Then cut one strip in half and place it aside until needed. Be sure to use high quality, fresh nori so it will be nice and crispy.
Remove the skin from your salmon and use a fork or your fingers to shred it into a small mixing bowl.
When you're ready to assemble the onigiri, wet your hands and rub a little bit of salt on them prior to handling the rice. This helps to season the rice and keep it from sticking to your hands.
Then take a handful of rice into your hand and flatten it slightly, making a small well in the middle for the filling.
Add a spoonful of shredded salmon to the well in the middle of the rice and cover with another small handful of rice.
Then form the salmon rice into a triangle shape by cupping your hands and gently pressing the rice with your palm and fingers (see video for more detail). Most beginners tend to press too hard when shaping the rice. Instead, you want to gently use your hands to form the rice into a triangle shape.
Next, wrap a strip of nori around the onigiri and press together where the nori strips overlap. Wetting the nori slightly where it overlaps helps it to stick better.
Serve and enjoy!