If you're looking to upgrade your store-bought frozen meatballs, there are a few easy ways to do it. First, try cooking them in a flavorful sauce. This will help to infuse them with flavor and prevent them from drying out. Another tip is to brown them before cooking them all the way through - this will give them a nice crispy exterior. Lastly, don't be afraid to add some seasonings to the mix. A little salt, pepper, and garlic can go a long way in boosting the flavor of frozen meatballs.