Start by preparing your glass with the salt rim garnish. You can do this by adding the salt to a plate and run some juicy lime flesh along the rim of the glass. Then rub the glass in the salt until it's covered enough. I recommend just half the rim.
Add your Tequila, lime juice, orange liqueur and agave syrup to a cocktail shaker with ice and shake hard for a good 10 - 12 seconds.
Using your tea strainer to catch the ice shards, double strain over ice in a rocks glass or in your coup glass without ice.
Add a slice of lime to your drink and you're ready to serve!