For a zippier, more refreshing cocktail (that's what summer drinks are about, right?), it's all in the wrist. Muddling extracts essential oils to deliver maximum herb impact. Tarragon flavors the boozy lemonade here, but basil makes an excellent sub. And while muddled mint is essential to a Mojito, you won't believe what it can add to a Margarita. Shake up a few and see.