Use a channel knife to cut a long strip of lemon peel. Twist it around a chopstick or bar spoon handle and set aside while you make the drink.
Cocktail
Add all of the cocktail ingredients to a shaker.
Fill the shaker with ice, and shake well, about 15-20 times.
Strain the drink into your serving glass.
Optionally add the lemon peel garnish to the glass. Serve and enjoy!
Notes
If the drink is too bitter for you, reduce the Campari to ¼ ounce.
If the drink is not sweet enough for you, increase the Cointreau.
For some more garnish options, try using a dehydrated lemon slice, a fresh lemon wedge, or simply twist a large piece of lemon peel on top of the drink just before serving to give the drink a fresh lemon aroma.