Boil sugar in water until it is melted into a syrup. Squeeze the lemons and pour the juice into the syrup. Now you have your own lemon syrup which can be mixed with water (at a ratio of 1/5 to 1/3 depending on how strong you want it). Mix your own lemonade with water, plenty of ice cubes, and optionally garnish with lemon, lime, mint, or lemon balm.