Lemonade for One, Pronto

Quick path to a refreshing drink. Freshly-squeezed juice is best, but bottled juice is convenient. Keep simple syrup on hand in the refrigerator for use in summer drinks.

1 oz (30 ml) lemon juice (about half a large lemon)
2 oz (60 ml) simple syrup
8 oz (250 ml) cold tap water 
ice cubes

Fill a large glass half full with ice cubes. To increase the yield of juice, heat the lemon in the microwave oven for about 20 seconds. When cool, cut in half through the equator. Alternatively, roll the lemon back and forth vigorously on a firm surface. Squeeze the juice into the glass, add the syrup, water, and enough additional ice to fill the glass, and stir. Serves one. Easily doubles, or make another for yourself.