Impart the drink with a strong citrus flavor by adding a wedge of citrus. Use a sliced off piece of rind to add just a hint. A spiral or slice of rind is the most common citrus garnish, but wedges are used occasionally. The most common citrus fruits to use are lemon, lime, and orange. However, feel free to experiment with something bitter, like grapefruit. Hold the fruit in your non-dominant hand and the knife in your dominant hand. Press the tip of the knife into the top of the fruit. Gently slide the knife down the fruit until you reach the bottom. Make another cut about ½ inch (12.7 mm) from that. Pull the wedge out of the fruit.  Always use caution with sharp knives so you don’t cut yourself. Cut a larger wedge if you want, but keep in mind that a larger slice adds more tartness. Squeeze a bit of the juice into the drink and then set the wedge in the glass. With a sharp knife, slice off a thin spiral from around the citrus fruit. Make sure you don’t cut into the pith, the white spongy part, of the fruit, because that will impart a bitter taste. Cut the spiral strip about ¼ inch (6.35 mm) thick and four to six inches (10 to 15 cm) long.  Another option is to cut an oval slice off of the citrus rind. Still be sure not to cut so deep into the fruit that you include the pith. Using a peeler rather than a knife is a faster option if you have one. Make sure that one end rests inside the drink to impart some essential oils into the drink. Alternatively, you can gently drop the rind into the drink and let it float on the surface. Gently squeeze the oval slice or the strip to add a few drops of pure citrus oil into the drink. You’ll see the oil floating on top of the drink.
Choose between a wedge of fruit or a slice of rind. Cut a wedge of fruit with a sharp knife. Use a paring knife to slice off a strip of citrus rind. Drape the strip over the side of the cocktail glass.