3 parts tequila (blanco)
1 part campari
1 part cointreau
juice of ½ lemon

Stir together with ice, drain into a martini or margarita glass, garnish with a slice or twist of lemon.

2 oz Gin
¾ oz fresh lemon juice
¾ oz honey syrup (use equal parts honey and warm water)

Shake ingredients together with ice, strain into a chilled coup or lowball, garnish with a twist of lemon

The honey and lemon were originally meant to mask the funk of this prohibition-era, bathtub-gin cocktail, but it turns out they're also just good ideas. More history: http://www.pbs.org/food/recipes/bees-knees-cocktail/

2 parts gin
1/2 part cointreau

Poor alcohol over ice in a low tumbler, stir. Optionally, add lemon juice. Garnish with lemon twist