This tip is only for when you need crumbled hamburger for say tacos or spaghetti sauce. I put my hamburger in a pot of water and boil it until it's done. Drain the water and bye-bye grease. Leave the meat in 1 or 2 chunks then after draining use a spatula to break up into crumbles/season & use!
It sounds weird but it works. You don't get that browned toasty taste but for tacos or spaghetti you are adding plenty of other flavors. I turn the fire on under the pan while breaking up the meat and any remaining water steams out.