This is my favorite cocktail to make at home. It has only three indredients, and as far as I am concerned it is light and healthy - or at least refreshing and low in sugar. I never measure anything when mixing drinks. For this I simply add some ice to a shaker, fill it almost to the top with vodka, squeeze in the juice of a couple limes and sweeten to taste with agave. A twist of lime might make a nice garnish, but to me it would just get in the way. Agave can replace simple syrup in any cocktail.