I forgot to mention how easy it is with very little supplies. All you need is 3 cabillitos or tall shot glasses and a 'martini shaker'. Just fill 1 cabillito full with tequila, dump it in with a half cabillito with the lemon or lime juice into the ice filled shaker then add about 3 'glugs' of agave nectar(more or less to taste), shake it up. Then pour into the 2 remaining cabillitos rimmed with the sugar. Yummm