Rec: Easy sauce - not too spicey...
I usually just combine equal parts of Hunt's prepared spaghetti sauce and crushed tomatoes. It tastes just like homemade, and because you are diluting the prepared sauce, it is much less spicey.
For the meatballs, I make a mixture of ground beef, Italian breadcrumbs, basil, an egg, and sometimes romano or Parmesan cheese, grated garlic, salt, and pepper. Form them into 1-inch balls and brown over medium heat on stovetop; drain, and pour above sauce over them. Cover, and simmer about 20 minutes or until meatballs are done.