My friend who is an avid cook showed me this the other day. Cut the very tips of your citrus fruits off before putting them into a juicer. Instead of catching some of the liquid in the closed ends, the juice will squirt all the way through. Flip over and do it again. Nothing goes to waste.
To get more juice out of a lemon, microwave it for 10 or 12 seconds and then roll it on the countertop.