I save the foam trays that produce comes on and use them as a base to store cookies and muffins. I place waxed paper between them and then place them in a zip lock freezer bag. I must tell you my results are not perfect, I attribute it to the thaw/freeze action of my frost free freezer compartment. With muffins I take them out and put them in the oven to thaw/heat and that gives them a just baked taste.
I also slice package and freeze some commercial cakes and pies.
This allows me to pull out single portions and helps eliminate waist