I've been really into lemon shake-ups this summer. They're simple and delicious -- but you've really got to shake them. The ice isn't optional, and the sugar can't be cut back too much.

Ingredients Step
ice cubes
½ lemon, washed
scant ¼ c. sugar
6 oz. water
Place ice in container with lid. Squeeze lemon into it, then drop in rind. Add sugar and a splash of water. Shake! Pour into glass and top with water to taste.