Do not overwork the ground chuck. Form burgers firmly but not too tight.
Make a deep indentation in the middle of each patty. This insures the middle will cook evenly as the burgers puff up.
Do not sear the burgers over hot flames. Cook more evenly over the hot portion of your grill.
Do not smash the burgers while cooking. This pushes all the juicy goodness out and can make the meat dry.
Allow the burgers to rest a few minutes before serving so the juices have time to settle.