Get double the amount of lime juice by cutting it in a different way.
The best way to cut a lime to get the maximum amount of juice is not in half, but in four slices. Stand the lime up vertically on a cutting board and, using a sharp knife, make a cut on each side of the lime, coming close to the center. Each "cheek" of the lime is packed with juices, and you can even squeeze a few more drops out of the core. You'll get more than double the amount of liquid than if you cut it in half.