Absolutely! If you know you'll be eating them soon (as in the next 3-5 days), wrap the leftover crab cakes in plastic and/or place them in an airtight container in the fridge. You can also store them in the freezer the same way for up to 3 months. Wrap them tightly in plastic wrap or foil before placing them in the freezer. If you use foil to wrap them, you can actually reheat them in the oven right in the foil, which is so convenient! To reheat from refrigerated or frozen, pop them in the oven and bake until heated through.