Meatloaf/Meatballs (The following ideas originated with www.30daygourmet.com - a WONDERFUL resource! I highly recommend their books. After years of doing this I have adapted their recipes to suit myself and you will do the same once you are comfortable with it.)
Use the recipe your family likes. Mine consists of ground beef, raw egg, breadcrumbs, fine diced onions, salt, pepper, garlic powder.
Personally, if you normally put tomato sauce in your meatloaf but not in your meatballs don't put it in until cooking time.
Mix everything together well. Put into freezer bags (1 quart bags filled full are enough for a meal of meatloaf or meatballs for my family of 5 with a serving or two leftover). Label and freeze.
To Use: Thaw meat mix.
For Meatloaf - Put into pan and shape for a loaf and bake at 350 until done, 45min.-1hour. If desired top with sauce of your choice 15 minutes before done.
For Meatballs - Shape balls and saute or bake until done. Serve with spaghetti or use for meatball subs.