I always keep oatmeal, grits and cornmeal on hand, and like to incorporate them into recipes, as well as eating them plain. I buy mine in bulk, from our nearest Amish grocery, but they are inexpensive compared to dry cereals, everywhere. For cooked cereal in a hurry, try the microwave in-the-bowl recipes on the box, you don’t need the more processed instant versions (that don’t taste as good either). There are many other choices of cook-type cereal; look up recipes from their manufacturer online or on the box.
Here are a few recipes to try.