If shrimp are wet, blot them with a paper towel to dry slightly. Toss shrimp with salt, pepper and sugar in a medium bowl.
Heat 1 1/2 teaspoons of the oil in a large skillet over high heat. Add half of the shrimp and cook for about 1 minute until browned. Flip with tongs and cook for an additional 30 seconds until browned on the second side Transfer the shrimp to a bowl and repeat with the remaining 1 1/2 teaspoon oil and the other half of the shrimp.
After the second half of the shrimp has cooked, add the first half back to the skillet and cover. Let sit for 1-2 minutes until shrimp are cooked through. Serve immediately.