You can use up leftover turkey in place of ground beef in most meals.
For example:
Chop up the turkey (white and dark meat) and add to:
Spagetti sauce (instead of ground beef)
Tacos (stir in seasoning mix and a little water add turkey to fry pan and viola! add in your taco shells, cheese, lettuce and tomato)
Lasagna (layer noodles, cheese, turkey, sauce, vegetables, etc and bake)
Instead of chicken alfredo - use turkey! - some turkey, white sauce, (maybe a little broccoli depending on your family) some egg noodles and you are good to go!
Turkey bagel pizza - slice bagels, add a little pizza sauce, some turkey and other favourite toppings, some cheese on top - broil in the oven until bubbling and (again) voila! Also works well with english muffins or flattened buns.