Step 1: Pour a thin layer of coarse sea salt or margarita salt onto a small plate. Take a lime wedge and run it around the rim of your chosen glass (e.g., a coupe, rocks glass, or margarita glass). Gently dip the rim into the salt, rotating to coat evenly. Set aside.
Step 2: In a cocktail shaker, combine the tequila, freshly squeezed lime juice, and agave nectar. Use a jigger for precise measurements to ensure optimal balance.
Step 3: Fill the cocktail shaker two-thirds full with ice. Secure the lid tightly and shake vigorously for 15-20 seconds, or until the shaker is icy cold to the touch. This chills and slightly dilutes the cocktail.
Step 4: Fill your prepared, salt-rimmed glass with fresh ice. Strain the margarita mixture from the shaker into the glass.
Step 5: Garnish with a fresh lime wheel or wedge. Serve immediately and enjoy your perfectly crafted Classic Zesty Margarita!