To grill like a master, use two skewers to stake the shrimp instead of one. This hack helps prevent common mistakes, like the shrimp slipping off or flipping its orientation.
Skewer the shrimp through the base of the abdomen, on the opposite side of the tail. To fit more onto the skewer, make sure all the shrimp are facing the same direction.
Then, poke another skewer through the bottom half of the abdomen, as close to the tail as you can while still giving the skewer enough meat to cut through, and start grilling.