Stop pressing on your burgers while cooking them. It takes all the juices out of the burger. I expected a juicy half pound chunk of meat, and I get a dry, well-done (and not the good way), and almost tasteless burger. I can tolerate the well-done part, since I don't really trust if the meat you use and the way it is stored and cooked is safe for rare consumption. However, the fact that I can't taste any fat in half-a-pound of beef of meat is unacceptable.
tl;dr: Do not press on your burgers.