One cocktail that I always enjoy in the summer is…
2 oz. Vodka
1/2 oz. Triple Sec
1/2 oz. Cranberry Juice
1/2 oz. Fresh Lime Juice
Pour ingredients into an ice filled shaker. Shake until cold and strain into a chilled cocktail glass. Garnish with a lemon or lime twist. Use just enough cranberry to color the drink a nice shade of pink.
Also check out the Cherry Cosmopolitan.