Use a vegetable peeler or a citrus channel knife to cut a long, thin strip of lemon peel. Clean up the peel's edges with an xacto knife if you used a vegetable peeler.
Wrap the lemon peel strip around something long and thin, like a bar spoon handle, and set aside while you make the drink.
Cocktail
Add the gin, lemon juice and simple syrup to a cocktail shaker.
Fill the shaker with ice and shake well, about 15-20 times.
Strain the drink through a regular strainer and a fine mesh strainer into the cocktail serving glass.