Sloppy Joes
Meat for beef tacos
spaghetti with meat sauce
super nachos (ground beef, tomato, nacho cheese, onion, green chili, jalapenos, lettuce, sour cream...)
egg rolls (bean sprouts, browned ground beef, cabbage, carrots, onion rolled into a large egg roll wrapper)
meat loaf

There are so many things you can make with ground beef. Might also go to allrecipes.com, put ground beef into the ingredients search engine and see what comes up? :)