Chill your highball glass in the freezer and fill your cocktail shaker with ice.
Pour your tequila, simple syrup, and all of your fruit juices into the cocktail shaker (and salt if you want)
Give it a couple good shakes (after putting the lid back on, of course). Remove the lid and carefully tumble it between the chilled highball glass and the mixer a few times.
Top off the drink with soda water; usually around 3 to 4 oz.
Garnish with an orange wheel on the rim of the glass.
Alternate Version
Chill your highball glass in the freezer and fill your cocktail shaker with ice.
Pour your tequila and fruit juices into the cocktail shaker (and salt if you want)
Give it a couple good shakes (after putting the lid back on, of course). Remove the lid and carefully tumble it between the chilled highball glass and the mixer a few times.
Top off the drink with grapefruit soda; usually around 5 to 6 oz.
Garnish with an orange wheel on the rim of the glass.